apt vs likely

apt and likely both are adjectives.

Word	Noun	Adjective	Verb	Adverb
apt	No	Yes	No	No
likely	No	Yes	No	Yes

apt (adjective)	likely (adjective)
being of striking appropriateness and pertinence	has a good chance of being the case or of coming about
(usually followed by `to') naturally disposed toward	within the realm of credibility
mentally quick and resourceful	expected to become or be; in prospect
at risk of or subject to experiencing something usually unpleasant

apt (adverb)	likely (adverb)
	with considerable certainty; without much doubt