A/C vs air-conditioner

A/C and air-conditioner both are nouns.

Word	Noun	Adjective	Verb	Adverb
A/C	Yes	No	No	No
air-conditioner	Yes	No	No	No

As nouns, A/C and air-conditioner are synonyms defined as:

A/C and air-conditioner: an appliance designed to extract humidity from the air and thereby cool it

Other synonyms of A/C include air conditioner.

A/C (noun)	air-conditioner (noun)
an appliance designed to extract humidity from the air and thereby cool it	an appliance designed to extract humidity from the air and thereby cool it