air cleaner vs air filter

air cleaner and air filter both are nouns.

Word	Noun	Adjective	Verb	Adverb
air cleaner	Yes	No	No	No
air filter	Yes	No	No	No

As nouns, air cleaner and air filter are synonyms defined as:

air cleaner and air filter: a filter that removes dust from the air that passes through it

air cleaner (noun)	air filter (noun)
a filter that removes dust from the air that passes through it	a filter that removes dust from the air that passes through it