Open English Wordnet
Adjectives
(s)farcical, ludicrous, ridiculousbroadly or extravagantly humorous; resembling farce“the wild farcical exuberance of a clown”, “ludicrous green hair”
(s)absurd, cockeyed, derisory, idiotic, laughable, ludicrous, nonsensical, preposterous, ridiculousso unreasonable as to invite derision“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”