dining room set vs dining room suite

dining room set and dining room suite both are nouns.

Word	Noun	Adjective	Verb	Adverb
dining room set	Yes	No	No	No
dining room suite	Yes	No	No	No

As nouns, dining room set and dining room suite are synonyms defined as:

dining room set and dining room suite: a suite of furniture for the dining room

Other synonyms of dining room set include dining-room set, dining-room suite.

dining room set (noun)	dining room suite (noun)
a suite of furniture for the dining room	a suite of furniture for the dining room