air conditioner vs air conditioning

air conditioner and air conditioning both are nouns.

Word	Noun	Adjective	Verb	Adverb
air conditioner	Yes	No	No	No
air conditioning	Yes	No	No	No

As nouns, air conditioner and air conditioning are synonyms defined as:

air conditioner and air conditioning: a system that keeps air cool and dry

air conditioner (noun)	air conditioning (noun)
a system that keeps air cool and dry	a system that keeps air cool and dry
an appliance designed to extract humidity from the air and thereby cool it