theatre vs dressing room

theatre and dressing room both are nouns.

Word	Noun	Adjective	Verb	Adverb
theatre	Yes	No	No	No
dressing room	Yes	No	No	No

theatre (noun)	dressing room (noun)
a building where theatrical performances or motion-picture shows can be presented	a room in which you can change clothes
the art of writing and producing plays
a region in which active military operations are in progress