supposed vs unlikely

supposed and unlikely both are adjectives.

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

supposed (adjective)	unlikely (adjective)
required or under orders	has little chance of being the case or coming about
doubtful or suspect	not likely to be true or to occur or to have occurred
based primarily on surmise rather than adequate evidence	having a probability too low to inspire belief
mistakenly believed