interior decorator vs room decorator

interior decorator and room decorator both are nouns.

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

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

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

Other synonyms of interior decorator include decorator, house decorator.

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