A family of Microsoft word processing software products for creating web, email, and print documents.
Dear Sajit,
Good day! Thank you for posting your query in our community.
Based on your description, my understanding is that you want to copy Excel merged cells into Word with the same format.
You can try to paste with the option to "Keep Source Formatting" like below:
If my understanding is wrong, please feel free to post back.
Sincerely,
Jazlyn | Microsoft Community Moderator