foolishness

nonsense, ridiculous idea

(an act of) being stupid

utter stupidity

madness

craziness, madness

something said, written etc that is foolish or does not make any sense; stupid behaviour

craziness, ridiculousness

a severe mental disorder in which a person loses contact with reality

mental illness; foolishness

a long, disorganized account or description

nonsense

futility

futility