Synonyms of BLACKJACK

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

Also: blackjack oak, jack oak, quercus marilandica.

a piece of metal covered by leather with a flexible handle; used for hitting people

• COSH9
• SAP5

a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship

Also: black flag, pirate flag, jolly roger.

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

Also: twenty-one, vingt-et-un.

exert pressure on someone through threats

• BLACKMAIL19
• PRESSURE10