unconvincing vs unlikely

unconvincing and unlikely both are adjectives.

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

As adjectives, unconvincing and unlikely are synonyms defined as:

unconvincing and unlikely: having a probability too low to inspire belief

Other synonyms of unconvincing include improbable, unbelievable.

unconvincing (adjective)	unlikely (adjective)
not convincing	has little chance of being the case or coming about
having a probability too low to inspire belief	not likely to be true or to occur or to have occurred
	having a probability too low to inspire belief