house decorator vs interior decorator

house decorator and interior decorator both are nouns.

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

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

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

Other synonyms of house decorator include decorator, room decorator.

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