QUICK THINKER

Three letters:

Err, the.

Four letters: Ache, feta, moat, ruse, serf, slur. Five letters: Embed, moose, ochre, rebut, rosti, shelf, spare, valet. Six letters: Endear, fracas, prefab, prompt, sexism, system. Seven letters: Abashed, attache, chateau, entente, handset, orbital. Eight letters: Easterly, pedicure.