room decorator vs interior decorator

room decorator and interior decorator both are nouns.

Word	Noun	Adjective	Verb	Adverb
room decorator	Yes	No	No	No
interior decorator	Yes	No	No	No

As nouns, room decorator and interior decorator are synonyms defined as:

room decorator and interior decorator: a person who specializes in interior decoration

Other synonyms of room decorator include decorator, house decorator.

room decorator (noun)	interior decorator (noun)
a person who specializes in interior decoration	a person who specializes in interior decoration