Synonyms of blackjack

1. blackjack oak, blackjack, jack oak, Quercus marilandica, scrub oak: usage: a common scrubby deciduous tree of central and southeastern United States having dark bark and broad three-lobed (club-shaped) leaves; tends to form dense thickets
2. blackjack, cosh, sap, bludgeon: usage: a piece of metal covered by leather with a flexible handle; used for hitting people
3. black flag, pirate flag, Jolly Roger, blackjack, flag: usage: a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship
4. blackjack, twenty-one, vingt-et-un, card game, cards: usage: a gambling game using cards; the object is to hold cards having a higher count than those dealt to the banker up to but not exceeding 21

1. blackmail, blackjack, pressure, influence, act upon, work: usage: exert pressure on someone through threats