comic vs laughable

comic is a noun but laughable is not a noun.

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

As adjectives, comic and laughable are synonyms defined as:

Other synonyms of comic include amusing, comical, funny, mirthful, risible.

comic (noun)	laughable (noun)
a professional performer who tells jokes and performs comical acts

comic (adjective)	laughable (adjective)
of or relating to or characteristic of comedy	so unreasonable as to invite derision
arousing or provoking laughter	arousing or provoking laughter