loon / lune [lu:n]
loon – n. & v. – n. – 1. an untaught or uncouth person; 2. sluggard, rogue; 3. an aquatic bird of the genus Colymbus, noted for its distinctive call; 4. a crazy person; v. – spend leisure time being idle or entertaining
lune – n. – 1. a tether for a hawk; 2. tantrums, fits of frenzy, madness; 3. something resembling a crescent or half moon; 4. the shape formed by two arcs of circles that enclose a space