unlikely vs supposed

unlikely and supposed both are adjectives.

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

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