Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → The fool laughs even when there's nothing to laugh at
βρομιάς, βρόμιος, δουπήτωρ, ἀμφίπαλτος, ἀμφιβόητος, ἀντίθροος, ἀντίκτυπος