distrustful vs questioning

distrustful is not a noun while questioning is a noun.

Word	Noun	Adjective	Verb	Adverb
distrustful	No	Yes	No	No
questioning	Yes	Yes	No	No

distrustful (noun)	questioning (noun)
	a request for information

distrustful (adjective)	questioning (adjective)
having or showing distrust	showing curiosity
	marked by or given to doubt
	perplexed (as if being expected to know something that you do not know)