stable vs unreactive

stable is a noun but unreactive is not a noun.

Word	Noun	Adjective	Verb	Adverb
stable	Yes	Yes	Yes	No
unreactive	No	Yes	No	No

stable (noun)	unreactive (noun)
a farm building for housing horses or other livestock

stable (adjective)	unreactive (adjective)
resistant to change of position or condition	(chemistry) not reacting chemically
maintaining equilibrium	not tending to react to stimulation
firm and dependable; subject to little fluctuation
showing little if any change
not taking part readily in chemical change

stable (verb)	unreactive (verb)
shelter in a stable