diff --git a/frontend/internal-packages/schema-bench/src/dictionaries/global.concepts.json b/frontend/internal-packages/schema-bench/src/dictionaries/global.concepts.json
new file mode 100644
index 0000000000..002274b48e
--- /dev/null
+++ b/frontend/internal-packages/schema-bench/src/dictionaries/global.concepts.json
@@ -0,0 +1,63 @@
+{
+  "concepts": [
+    {
+      "id": "customer_info",
+      "aliases": ["customer_info", "client_data"]
+    },
+    {
+      "id": "order_detail",
+      "aliases": [
+        "order_detail",
+        "order_details",
+        "order_items",
+        "purchase_items"
+      ]
+    },
+    {
+      "id": "user_profile",
+      "aliases": ["user_profile", "user_profiles", "account_info"]
+    },
+    {
+      "id": "customer_account",
+      "aliases": [
+        "customer_account",
+        "customers",
+        "accounts",
+        "customer_surrogates",
+        "user_accounts"
+      ]
+    },
+    {
+      "id": "customer_pii",
+      "aliases": ["customer_pii", "account_pii", "user_pii"]
+    },
+    {
+      "id": "closure_reason",
+      "aliases": [
+        "closure_reason",
+        "closure_reason_master",
+        "withdrawal_reason_dim",
+        "withdrawal_reasons"
+      ]
+    },
+    {
+      "id": "account_closure",
+      "aliases": ["account_closure", "withdrawal_requests", "withdrawal_events"]
+    },
+    {
+      "id": "data_erasure_request",
+      "aliases": [
+        "data_erasure_request",
+        "deletion_job_run",
+        "deletion_job_item",
+        "legal_holds",
+        "erasure_jobs",
+        "pii_transformations"
+      ]
+    },
+    {
+      "id": "audit_log",
+      "aliases": ["audit_log"]
+    }
+  ]
+}
diff --git a/frontend/internal-packages/schema-bench/src/dictionaryMatch/dictionaryMatch.test.ts b/frontend/internal-packages/schema-bench/src/dictionaryMatch/dictionaryMatch.test.ts
new file mode 100644
index 0000000000..b1a0932656
--- /dev/null
+++ b/frontend/internal-packages/schema-bench/src/dictionaryMatch/dictionaryMatch.test.ts
@@ -0,0 +1,36 @@
+import { describe, expect, it } from 'vitest'
+import { dictionaryMatch } from './dictionaryMatch'
+
+describe('dictionaryMatch (concept-based)', () => {
+  it('matches domain synonyms via concept aliases (customer_info ↔ client_data)', () => {
+    const reference = ['customer_info']
+    const predict = ['client_data']
+    const mapping: Record<string, string> = {}
+    dictionaryMatch(reference, predict, mapping)
+    expect(mapping).toEqual({ customer_info: 'client_data' })
+  })
+
+  it('matches industry expressions (order_details ↔ purchase_items)', () => {
+    const reference = ['order_details']
+    const predict = ['purchase_items']
+    const mapping: Record<string, string> = {}
+    dictionaryMatch(reference, predict, mapping)
+    expect(mapping).toEqual({ order_details: 'purchase_items' })
+  })
+
+  it('matches abbreviation vs formal name (user_profiles ↔ account_info)', () => {
+    const reference = ['user_profiles']
+    const predict = ['account_info']
+    const mapping: Record<string, string> = {}
+    dictionaryMatch(reference, predict, mapping)
+    expect(mapping).toEqual({ user_profiles: 'account_info' })
+  })
+
+  it('does not falsely match unrelated (client_log ↔ customer_info)', () => {
+    const reference = ['customer_info']
+    const predict = ['client_log']
+    const mapping: Record<string, string> = {}
+    dictionaryMatch(reference, predict, mapping)
+    expect(mapping).toEqual({})
+  })
+})
diff --git a/frontend/internal-packages/schema-bench/src/dictionaryMatch/dictionaryMatch.ts b/frontend/internal-packages/schema-bench/src/dictionaryMatch/dictionaryMatch.ts
new file mode 100644
index 0000000000..b9811fb042
--- /dev/null
+++ b/frontend/internal-packages/schema-bench/src/dictionaryMatch/dictionaryMatch.ts
@@ -0,0 +1,211 @@
+/**
+ * Dictionary (Concept) Matching
+ *
+ * concept ID based matching using
+ * a pre-registered dictionary of alias groups. If a reference and
+ * a candidate resolve to the same concept, we map them with priority
+ * over other strategies.
+ */
+import fs from 'node:fs'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+/**
+ * Mapping from reference name to candidate name.
+ * Mutated in place by `dictionaryMatch` to assign matches.
+ */
+type Mapping = Record<string, string>
+
+/**
+ * A single concept entry defined in a dictionary.
+ * Represents a stable concept ID and its alias names.
+ */
+type Concept = {
+  /** Stable identifier used as the match key across aliases. */
+  id: string
+  /** Names/aliases that refer to the same concept (before normalization). */
+  aliases: string[]
+  /** Optional contextual scope labels (not used by matching currently). */
+  scope?: string[]
+}
+
+/**
+ * On-disk dictionary file shape as parsed from JSON.
+ */
+type ConceptDictionaryFile = {
+  /** List of concept definitions with their aliases. */
+  concepts: Concept[]
+}
+
+/**
+ * In-memory index built from one or more dictionaries for fast lookup.
+ */
+type ConceptIndex = {
+  /** Normalized alias → concept ID. */
+  aliasToConcept: Map<string, string>
+  /** Concept ID → list of normalized aliases. */
+  conceptToAliases: Map<string, string[]>
+}
+
+function normalizeAlias(s: string): string {
+  // Basic canonicalization: lowercase, split CamelCase, replace non-alnum with underscore, trim underscores
+  const camelSplit = s.replace(/([a-z0-9])([A-Z])/g, '$1_$2')
+  const lowered = camelSplit.toLowerCase()
+  const replaced = lowered.replace(/[^a-z0-9]+/g, '_')
+  return replaced.replace(/^_+|_+$/g, '')
+}
+
+function toTokens(s: string): string[] {
+  return normalizeAlias(s).split('_').filter(Boolean)
+}
+
+function jaccard(a: Set<string>, b: Set<string>): number {
+  const inter = [...a].filter((x) => b.has(x)).length
+  const uni = new Set([...a, ...b]).size
+  return uni === 0 ? 0 : inter / uni
+}
+
+function readJsonFile(filePath: string): ConceptDictionaryFile | null {
+  try {
+    const raw = fs.readFileSync(filePath, 'utf8')
+    const parsed = JSON.parse(raw)
+    return parsed
+  } catch {
+    return null
+  }
+}
+
+/**
+ * Load default dictionary shipped with this package.
+ */
+function loadDefaultConceptDictionary(): ConceptDictionaryFile | null {
+  // Resolve relative to this module file so tests/CLI can locate it reliably
+  const __dirnameLocal = fileURLToPath(new URL('.', import.meta.url))
+  const dictionaryFilePath = path.resolve(
+    __dirnameLocal,
+    '../dictionaries/global.concepts.json',
+  )
+  return readJsonFile(dictionaryFilePath)
+}
+
+function buildConceptIndex(): ConceptIndex {
+  const aliasToConcept = new Map<string, string>()
+  const conceptToAliases = new Map<string, string[]>()
+
+  const selectedDictionaries: ConceptDictionaryFile[] = []
+  const defaultDictionary = loadDefaultConceptDictionary()
+  if (defaultDictionary) {
+    selectedDictionaries.push(defaultDictionary)
+  } else {
+    // Warn so consumers notice dictionary-based matching is disabled
+    console.warn(
+      '[schema-bench] No concept dictionaries loaded; dictionaryMatch will be a no-op.',
+    )
+  }
+
+  for (const dictionary of selectedDictionaries) {
+    for (const concept of dictionary.concepts) {
+      const normalizedAliases = concept.aliases.map((alias) =>
+        normalizeAlias(alias),
+      )
+      conceptToAliases.set(concept.id, normalizedAliases)
+      for (const normalizedAlias of normalizedAliases) {
+        const existingConceptId = aliasToConcept.get(normalizedAlias)
+        if (existingConceptId && existingConceptId !== concept.id) {
+          // Keep the first mapping deterministically and warn for visibility
+          console.warn(
+            `[schema-bench] Duplicate alias "${normalizedAlias}" for concepts "${existingConceptId}" and "${concept.id}". Keeping "${existingConceptId}".`,
+          )
+          continue
+        }
+        aliasToConcept.set(normalizedAlias, concept.id)
+      }
+    }
+  }
+
+  return { aliasToConcept, conceptToAliases }
+}
+
+function inferConceptByTokens(
+  name: string,
+  index: ConceptIndex,
+): string | null {
+  const tokens = toTokens(name)
+  const tokenSet = new Set(tokens)
+  let best: { id: string; score: number } | null = null
+  for (const [id, aliases] of index.conceptToAliases) {
+    for (const alias of aliases) {
+      const aliasTokens = toTokens(alias)
+      const score = jaccard(tokenSet, new Set(aliasTokens))
+      if (!best || score > best.score) best = { id, score }
+    }
+  }
+  const threshold = 0.8
+  return best && best.score >= threshold ? best.id : null
+}
+
+function resolveConceptId(name: string, index: ConceptIndex): string | null {
+  const normalized = normalizeAlias(name)
+  const conceptByAlias = index.aliasToConcept.get(normalized)
+  if (conceptByAlias) return conceptByAlias
+  return inferConceptByTokens(name, index)
+}
+
+/**
+ * Assign predicted names to reference names when they share the same concept.
+ *
+ * Parameters:
+ * - `references`: Reference names to be mapped.
+ * - `predictNames`: Predicted names to map from.
+ * - `mapping`: Existing partial mapping; respected as-is and extended.
+ *
+ * Notes:
+ * - Each predicted name is used at most once.
+ * - References with no resolvable concept remain unmapped.
+ */
+
+// biome-ignore lint/complexity/noExcessiveCognitiveComplexity: TODO: Refactor to reduce complexity
+export function dictionaryMatch(
+  referenceNames: string[],
+  predictNames: string[],
+  mapping: Mapping,
+): void {
+  const localIndex = buildConceptIndex()
+
+  // Track used candidates to avoid duplicates
+  const usedPredictNames = new Set(Object.values(mapping))
+
+  // Precompute candidate concepts
+  const predictConceptIdByName = new Map<string, string | null>()
+  for (const predictName of predictNames) {
+    predictConceptIdByName.set(
+      predictName,
+      resolveConceptId(predictName, localIndex),
+    )
+  }
+
+  for (const referenceName of referenceNames) {
+    if (mapping[referenceName] !== undefined) continue
+    const referenceConceptId = resolveConceptId(referenceName, localIndex)
+    if (!referenceConceptId) continue
+
+    // Choose the first unused candidate with the same concept; if multiple, prefer higher token overlap
+    let bestPredict: { name: string; score: number } | null = null
+    for (const predictName of predictNames) {
+      if (usedPredictNames.has(predictName)) continue
+      const predictConceptId = predictConceptIdByName.get(predictName)
+      if (!predictConceptId || predictConceptId !== referenceConceptId) continue
+      // Score by token Jaccard
+      const similarityScore = jaccard(
+        new Set(toTokens(referenceName)),
+        new Set(toTokens(predictName)),
+      )
+      if (!bestPredict || similarityScore > bestPredict.score)
+        bestPredict = { name: predictName, score: similarityScore }
+    }
+    if (bestPredict) {
+      mapping[referenceName] = bestPredict.name
+      usedPredictNames.add(bestPredict.name)
+    }
+  }
+}
diff --git a/frontend/internal-packages/schema-bench/src/dictionaryMatch/index.ts b/frontend/internal-packages/schema-bench/src/dictionaryMatch/index.ts
new file mode 100644
index 0000000000..e9ee610717
--- /dev/null
+++ b/frontend/internal-packages/schema-bench/src/dictionaryMatch/index.ts
@@ -0,0 +1 @@
+export * from './dictionaryMatch'
diff --git a/frontend/internal-packages/schema-bench/src/evaluate/evaluate.ts b/frontend/internal-packages/schema-bench/src/evaluate/evaluate.ts
index b32a52bc72..61dbf60bba 100644
--- a/frontend/internal-packages/schema-bench/src/evaluate/evaluate.ts
+++ b/frontend/internal-packages/schema-bench/src/evaluate/evaluate.ts
@@ -14,6 +14,7 @@
 import type { ForeignKeyConstraint, Schema } from '@liam-hq/schema'
 import { foreignKeyConstraintSchema } from '@liam-hq/schema'
 import * as v from 'valibot'
+import { dictionaryMatch } from '../dictionaryMatch/dictionaryMatch.ts'
 import { nameSimilarity } from '../nameSimilarity/nameSimilarity.ts'
 import { wordOverlapMatch } from '../wordOverlapMatch/wordOverlapMatch.ts'
 
@@ -42,6 +43,7 @@ const createTableMapping = async (
 
   // NOTE: Implement synonym matching if needed
   // --- (0) synonym matching
+  dictionaryMatch(referenceTableNames, predictTableNames, tableMapping)
 
   // --- (1) name similarity matching
   await nameSimilarity(referenceTableNames, predictTableNames, tableMapping)
@@ -82,6 +84,7 @@ const createColumnMapping = async (
 
   // NOTE: Implement synonym matching if needed
   // --- (0) synonym matching
+  dictionaryMatch(referenceColumnNames, predictColumnNames, columnMapping)
 
   // --- (1) name similarity matching
   await nameSimilarity(referenceColumnNames, predictColumnNames, columnMapping)
diff --git a/frontend/internal-packages/schema-bench/src/index.ts b/frontend/internal-packages/schema-bench/src/index.ts
index 39408b5c94..631bc62d97 100644
--- a/frontend/internal-packages/schema-bench/src/index.ts
+++ b/frontend/internal-packages/schema-bench/src/index.ts
@@ -1,3 +1,4 @@
+export * from './dictionaryMatch'
 export * from './evaluate'
 export type {
   OpenAIExecutorConfig,