The Oxford Thesaurus An A-Z Dictionary of Synonyms - absurdity n.

1) folly, silliness, ridiculousness, foolishness, ludicrousness, nonsense, senselessness, meaninglessness, illogicality, irrationality, unreasonableness, incongruity, stupidity, Colloq craziness, nuttiness , Chiefly Brit daftness: Many comics rely on absurdity rather than cleverness for humour. 2) paradox, self-contradiction, error, fallacy: No one can abide the man's pretentiousness and other absurdities.