inform vs informant

inform is not a noun while informant is a noun.

Word	Noun	Adjective	Verb	Adverb
inform	No	No	Yes	No
informant	Yes	No	No	No

inform (noun)	informant (noun)
	a person who supplies information
	someone who sees an event and reports what happened

inform (verb)	informant (verb)
give character or essence to
impart knowledge of some fact, state of affairs, or event to
act as an informer