inhibitor vs inhibit

inhibitor is a noun but inhibit is not a noun.

Word	Noun	Adjective	Verb	Adverb
inhibitor	Yes	No	No	No
inhibit	No	No	Yes	No

inhibitor (noun)	inhibit (noun)
a substance that retards or stops an activity

inhibitor (verb)	inhibit (verb)
	prohibit, forbid, or prevent from doing something
	make (someone) self-conscious and as a result unable to act naturally
	consciously restrain from showing; of emotions, desires, impulses, or behavior
	limit, block, or decrease the action or function of