farfetched vs unlikely

farfetched and unlikely both are adjectives.

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

farfetched (adjective)	unlikely (adjective)
(of an idea or story) so exaggerated or ludicrous as to be improbable	has little chance of being the case or coming about
(of a theory or explanation) highly imaginative but unlikely and unconvincing	not likely to be true or to occur or to have occurred
	having a probability too low to inspire belief