mirthful vs laughable

mirthful and laughable both are adjectives.

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

As adjectives, mirthful and laughable are synonyms defined as:

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

mirthful (adjective)	laughable (adjective)
arousing or provoking laughter	so unreasonable as to invite derision
full of or showing high-spirited merriment	arousing or provoking laughter