The Oxford Thesaurus An A-Z Dictionary of Synonyms - decoy n.

1) bait, lure, trap, attraction, enticement, inducement, stool-pigeon: The hunters set out their decoys and waited for the ducks. --v. 2) lure, entrap, entice, attract, induce, seduce, bait, trick, tempt, ensnare, inveigle, allure: He was decoyed into a dark alley and robbed.