off-line vs computing

off-line is not a noun while computing is a noun.

Word	Noun	Adjective	Verb	Adverb
off-line	No	Yes	No	No
computing	Yes	No	No	No

off-line (noun)	computing (noun)
	the procedure of calculating; determining something by mathematical or logical methods
	the branch of engineering science that studies (with the aid of computers) computable processes and structures

off-line (adjective)	computing (adjective)
not connected to a computer network
not on a regular route of a transportation system