street cleaner vs street sweeper

street cleaner and street sweeper both are nouns.

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

As nouns, street cleaner and street sweeper are synonyms defined as:

street cleaner and street sweeper: a worker employed to clean streets (especially one employed by a municipal sanitation department)

street cleaner (noun)	street sweeper (noun)
a worker employed to clean streets (especially one employed by a municipal sanitation department)	a worker employed to clean streets (especially one employed by a municipal sanitation department)