laughable vs ridiculous

laughable and ridiculous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
laughable	No	Yes	No	No
ridiculous	No	Yes	No	No

As adjectives, laughable and ridiculous are synonyms defined as:

Other synonyms of laughable include absurd, cockeyed, derisory, idiotic, ludicrous, nonsensical, preposterous.

laughable (adjective)	ridiculous (adjective)
so unreasonable as to invite derision	so unreasonable as to invite derision
arousing or provoking laughter	broadly or extravagantly humorous; resembling farce
	inspiring scornful pity