diff --git a/package.json b/package.json
index 6ffe1e4..17581a5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@knovator/masters-node",
-  "version": "2.3.0",
+  "version": "2.4.0",
   "license": "MIT",
   "author": "knovator (https://knovator.com/)",
   "description": "NodeJS backend for @knovator/masters",
diff --git a/src/controllers/masterController.ts b/src/controllers/masterController.ts
index 4132407..58b08c2 100644
--- a/src/controllers/masterController.ts
+++ b/src/controllers/masterController.ts
@@ -13,14 +13,22 @@ import {
   createDocument,
   getDocumentByQuery,
 } from '../helpers/dbService';
+import { mergeSubmastersFunc } from '../helpers/utils';
 
 const catchAsync = (fn: any) => {
   return defaults.catchAsync(fn);
 };
 
 export const createMaster = catchAsync(async (req: any, res: any) => {
+  const { mergeSubmasters = [], synonym = [], ...restBody } = req.body;
+  const mergeSubmastersID = mergeSubmasters.map(
+    (submaster: any) => submaster.value
+  );
+  let mergedSynonyms = await mergeSubmastersFunc(mergeSubmastersID, Master);
+  mergedSynonyms = [...mergedSynonyms, ...synonym];
   const data = new Master({
-    ...req.body,
+    ...restBody,
+    synonym: mergedSynonyms,
   });
   if (data.parentId && data.isDefault) {
     await bulkUpdate(
@@ -33,6 +41,18 @@ export const createMaster = catchAsync(async (req: any, res: any) => {
   const result = await Master.populate(masterData, [
     { path: 'img', select: 'uri' },
   ]);
+
+  if (mergeSubmastersID.length > 0) {
+    try {
+      await Master.deleteMany({ _id: { $in: mergeSubmastersID } });
+      defaults.onMastersMerged(mergeSubmastersID, masterData._id.toString());
+    } catch (error) {
+      throw new Error(
+        `Failed to delete mergeSubmasters: ${(error as Error).message}`
+      );
+    }
+  }
+
   if (result) {
     let section = result.parentCode ? 'submaster' : 'master';
     res.message = req?.i18n?.t(`${section}.create`);
@@ -41,8 +61,17 @@ export const createMaster = catchAsync(async (req: any, res: any) => {
 });
 
 export const updateMaster = catchAsync(async (req: any, res: any) => {
+  const { mergeSubmasters = [], synonym = [], ...restBody } = req.body;
+  const mergeSubmastersID = mergeSubmasters.map(
+    (submaster: any) => submaster.value
+  );
+  let mergedSynonyms = await mergeSubmastersFunc(mergeSubmastersID, Master);
+  mergedSynonyms = [...mergedSynonyms, ...synonym];
+  const data = {
+    ...restBody,
+    synonym: mergedSynonyms,
+  };
   const id = req.params.id;
-  const data = req.body;
   if (data.isDefault) {
     // checking if data contains isDefault, if contains, reset all defaults
     const masterData: any = await getDocumentByQuery(Master, { _id: id });
@@ -63,6 +92,16 @@ export const updateMaster = catchAsync(async (req: any, res: any) => {
     { new: true },
     { path: 'img', select: 'uri' }
   );
+  if (mergeSubmastersID?.length > 0) {
+    try {
+      await Master.deleteMany({ _id: { $in: mergeSubmastersID } });
+      defaults.onMastersMerged(mergeSubmastersID, id);
+    } catch (error) {
+      throw new Error(
+        `Failed to delete mergeSubmasters: ${(error as Error).message}`
+      );
+    }
+  }
   const result = await Master.findOne({ _id: id });
   if (result) {
     let section = result.parentCode ? 'submaster' : 'master';
@@ -165,6 +204,7 @@ export const deleteMaster = catchAsync(async (req: any, res: any) => {
 export const listMaster = catchAsync(async (req: any, res: any) => {
   let { page, limit, sort, populate } = req.body.options;
   const isCountOnly = req.body.isCountOnly || false;
+  const exclude = req.body.exclude;
   const search = req.body.search || '';
   const customQuery = req.body.query || {};
   let sortMaster = sort ? sort : { seq: 1 };
@@ -191,6 +231,7 @@ export const listMaster = catchAsync(async (req: any, res: any) => {
     customOptions,
     isCountOnly,
     search,
+    exclude,
     customQuery,
     isActive === null ? [true, false] : [isActive],
     populate,
diff --git a/src/helpers/defaults.ts b/src/helpers/defaults.ts
index b7cc35c..cded12e 100644
--- a/src/helpers/defaults.ts
+++ b/src/helpers/defaults.ts
@@ -2,6 +2,7 @@ import { RESPONSE_CODE, internalServerError } from "../constants/common";
 
 export default {
   logger: console,
+  onMastersMerged: (_removedMasterIds: string[], _newMasterId: string) => {},
   catchAsync: function (fn: any) {
     return function (req: any, res: any, next: any) {
       Promise.resolve(fn(req, res, next)).catch((err) => {
diff --git a/src/helpers/utils.ts b/src/helpers/utils.ts
new file mode 100644
index 0000000..934d568
--- /dev/null
+++ b/src/helpers/utils.ts
@@ -0,0 +1,22 @@
+export async function mergeSubmastersFunc(mergeSubmastersID: object, Master: any) {
+    const submasters = await Master.find({ _id: { $in: mergeSubmastersID } }).select('names name');
+
+    const namesSet: Set<string> = new Set();
+  
+    submasters.forEach((submaster: any) => {
+      if (submaster.names) {
+        Object.values(submaster.names || {}).forEach((masterName) => {
+          namesSet.add(masterName as string);
+        });
+      }
+  
+      if (submaster.name) {
+        namesSet.add(submaster.name);
+      }
+    });
+  
+    const namesArr = Array.from(namesSet);
+
+    return namesArr;
+  }
+  
\ No newline at end of file
diff --git a/src/helpers/validations/create.ts b/src/helpers/validations/create.ts
index e79e335..677599e 100644
--- a/src/helpers/validations/create.ts
+++ b/src/helpers/validations/create.ts
@@ -29,6 +29,8 @@ export default joi
     deletedBy: joi.object().optional(),
     deletedAt: joi.date().optional(),
     isActive: joi.boolean().default(true),
+    synonym: joi.array().optional(),
+    mergeSubmasters: joi.array().optional()
   })
   .custom(async (obj) => {
     const { parentId, code } = obj;
diff --git a/src/helpers/validations/list.ts b/src/helpers/validations/list.ts
index b4d542b..d4fcc1b 100644
--- a/src/helpers/validations/list.ts
+++ b/src/helpers/validations/list.ts
@@ -3,6 +3,7 @@ import joi from 'joi';
 export default joi
   .object({
     language: joi.string().optional(),
+    exclude: joi.string().optional(),
     search: joi.string().allow('').default(''),
     query: joi
       .object({
diff --git a/src/helpers/validations/update.ts b/src/helpers/validations/update.ts
index 0f0fa2d..fbf0449 100644
--- a/src/helpers/validations/update.ts
+++ b/src/helpers/validations/update.ts
@@ -15,5 +15,7 @@ export default joi
     seq: joi.number().optional(),
     updatedBy: joi.object().optional(),
     extra: joi.string().optional(),
+    synonym: joi.array().optional(),
+    mergeSubmasters: joi.array().optional()
   })
   .unknown(false);
diff --git a/src/index.ts b/src/index.ts
index e68abb4..df3f15f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -9,6 +9,7 @@ interface MastersProps {
   preDelete: (_record: any) => Promise<{}>;
   postUpdate: (_record: any) => Promise<{}>;
   languages: LanguageType[];
+  onMastersMerged: any
 }
 
 export function masters({
@@ -18,7 +19,9 @@ export function masters({
   preDelete,
   postUpdate,
   languages,
+  onMastersMerged
 }: Partial<MastersProps> = defaults) {
+  if (typeof onMastersMerged === 'function') defaults.onMastersMerged = onMastersMerged
   if (typeof catchAsync === 'function') defaults.catchAsync = catchAsync;
   if (typeof authentication === 'function')
     defaults.authentication = authentication;
diff --git a/src/models/Master.ts b/src/models/Master.ts
index 5925e83..1472502 100644
--- a/src/models/Master.ts
+++ b/src/models/Master.ts
@@ -44,6 +44,7 @@ export const MasterSchema = new Schema<MasterType>(
     createdBy: { type: Schema.Types.ObjectId, ref: 'user' },
     updatedBy: [{ type: Schema.Types.ObjectId, ref: 'user' }],
     deletedBy: { type: Schema.Types.ObjectId, ref: 'user' },
+    synonym: [],
   },
   { timestamps: { createdAt: 'createdAt', updatedAt: 'updatedAt' } }
 );
diff --git a/src/services/master.ts b/src/services/master.ts
index fbadf7c..7d53d97 100644
--- a/src/services/master.ts
+++ b/src/services/master.ts
@@ -62,6 +62,7 @@ export const listMaster = async (
   customOptions: any,
   isCountOnly: any,
   search: any,
+  exclude: string,
   customQuery: any,
   onlyActive = [true],
   populate: any,
@@ -88,6 +89,12 @@ export const listMaster = async (
                 },
               },
             ]),
+        {
+              synonym : {
+                $regex: search,
+                $options: 'i',
+              },
+            },
         {
           code: {
             $regex: search.replace(/\s+/g, '_'),
@@ -132,6 +139,9 @@ export const listMaster = async (
           }
         : {}),
     };
+    if (exclude) {
+      (query as any)._id = { $ne: exclude };
+    }
     let options = {
       select: [],
       collation: '',
diff --git a/types/index.d.ts b/types/index.d.ts
index 25e1dd1..f47f7ca 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -34,6 +34,7 @@ type MasterType = {
   createdBy: import('mongoose').ObjectId;
   updatedBy: [import('mongoose').ObjectId];
   deletedBy: import('mongoose').ObjectId;
+  synonym: []
 };
 
 type EntityType = MasterType;