computing vs off-line

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

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

computing (noun)	off-line (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

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