likely vs promising

likely and promising both are adjectives.

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

likely (adjective)	promising (adjective)
has a good chance of being the case or of coming about	likely to turn out well in the future
within the realm of credibility	showing possibility of achievement or excellence
expected to become or be; in prospect

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