Словарь синонимов английского языка - lunacy

(n) 1. madness, insanity, dementia, craziness, derangement, psychosis, mania: Formerly, it was believed that lunacy fluctuated in accordance with the phases of the moon. 2. folly, foolishness, bad or poor judgement, illogicality, illogic, senselessness, ridiculousness, irrationality, foolhardiness, stupidity: It would be sheer lunacy to confess to something you did not do.