elevator boy vs elevator man

elevator boy and elevator man both are nouns.

Word	Noun	Adjective	Verb	Adverb
elevator boy	Yes	No	No	No
elevator man	Yes	No	No	No

As nouns, elevator boy and elevator man are synonyms defined as:

Other synonyms of elevator boy include liftman.

elevator boy (noun)	elevator man (noun)
a man employed to operate an elevator	a man employed to operate an elevator