hydrogen vs hydrogenate

hydrogen is a noun but hydrogenate is not a noun.

Word	Noun	Adjective	Verb	Adverb
hydrogen	Yes	No	No	No
hydrogenate	No	No	Yes	No

hydrogen (noun)	hydrogenate (noun)
a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe

hydrogen (verb)	hydrogenate (verb)
	combine or treat with or expose to hydrogen; add hydrogen to the molecule of (an unsaturated organic compound)