laughable vs funny

laughable is not a noun while funny is a noun.

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

As adjectives, laughable and funny are synonyms defined as:

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

laughable (noun)	funny (noun)
	an account of an amusing incident (usually with a punch line)

laughable (adjective)	funny (adjective)
so unreasonable as to invite derision	arousing or provoking laughter
arousing or provoking laughter	experiencing odd bodily sensations
	not as expected
	beyond or deviating from the usual or expected