compatible vs computer

compatible is not a noun while computer is a noun.

Word	Noun	Adjective	Verb	Adverb
compatible	No	Yes	No	No
computer	Yes	No	No	No

compatible (noun)	computer (noun)
	a machine for performing calculations automatically
	an expert at calculation (or at operating calculating machines)

compatible (adjective)	computer (adjective)
able to exist and perform in harmonious or agreeable combination
capable of being used with or connected to other devices or components without modification
capable of forming a homogeneous mixture that neither separates nor is altered by chemical interaction