computer vs compatible

computer is a noun but compatible is not a noun.

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

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

computer (adjective)	compatible (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