(uncountable) The state of being foolish. / (countable) A thing or event that is foolish, or an absurdity.

plural of foolishness

(of a person, an action, etc.) Lacking good sense or judgement; unwise. / Resembling or characteristic of a fool.

(nonstandard or humorous) comparative form of foolish: more foolish

(US, regional) foolish behavior; folly

plural of foolishment

Being unwise in dealing with large amounts of money.

(idiomatic) Prudent and thrifty with small amounts of money, but wasteful with large amounts.

Alternative form of penny wise and pound foolish

Alternative form of penny wise and pound foolish