garbage man vs garbageman

garbage man and garbageman both are nouns.

Word	Noun	Adjective	Verb	Adverb
garbage man	Yes	No	No	No
garbageman	Yes	No	No	No

As nouns, garbage man and garbageman are synonyms defined as:

garbage man and garbageman: someone employed to collect and dispose of refuse

Other synonyms of garbage man include dustman, garbage carter, garbage collector, garbage hauler, refuse collector.

garbage man (noun)	garbageman (noun)
someone employed to collect and dispose of refuse	someone employed to collect and dispose of refuse