laughable

"the absurd excuse that the dog ate his homework"
"that's a cockeyed idea"
"ask a nonsensical question and get a nonsensical answer"
"a contribution so small as to be laughable"
"it is ludicrous to call a cottage a mansion"
"a preposterous attempt to turn back the pages of history"
"her conceited assumption of universal interest in her rather dull children was ridiculous"

"an amusing film with a steady stream of pranks and pratfalls"
"an amusing fellow"
"a comic hat"
"a comical look of surprise"
"funny stories that made everybody laugh"
"a very funny writer"
"it would have been laughable if it hadn't hurt so much"
"a mirthful experience"
"risible courtroom antics"