QUICK THINKER

Three letters: But; Cos; Day; Use. Five letters: Cello; Coypu; Hotel; Label; Ratty; Skunk. Six letters: Ambler; Eclair; Jotter; Loafer; Racist; Radish. Seven letters: Amorous; Hearten; Rectory; Stamina. Nine letters: Cataclysm; Overshoot; Stocklist; Tributary. Eleven letters: Astigmatism; Detrimental.