questionable vs supposed

questionable and supposed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
questionable	No	Yes	No	No
supposed	No	Yes	No	No

questionable (adjective)	supposed (adjective)
subject to question	required or under orders
able to be refuted	doubtful or suspect
	based primarily on surmise rather than adequate evidence
	mistakenly believed