idiotic vs laughable

idiotic and laughable both are adjectives.

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

As adjectives, idiotic and laughable are synonyms defined as:

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

idiotic (adjective)	laughable (adjective)
so unreasonable as to invite derision	so unreasonable as to invite derision
insanely irresponsible	arousing or provoking laughter
having a mental age of three to seven years