street cleaner vs cleaner

street cleaner and cleaner both are nouns.

Word	Noun	Adjective	Verb	Adverb
street cleaner	Yes	No	No	No
cleaner	Yes	No	No	No

As nouns, cleaner is a hypernym of street cleaner; that is, cleaner is a word with a broader meaning than street cleaner:

street cleaner: a worker employed to clean streets (especially one employed by a municipal sanitation department)
cleaner: someone whose occupation is cleaning

street cleaner (noun)	cleaner (noun)
a worker employed to clean streets (especially one employed by a municipal sanitation department)	a preparation used in cleaning something
	someone whose occupation is cleaning
	the operator of dry-cleaning establishment