| BLUEJACKS | • bluejacks v. Third-person singular simple present indicative form of bluejack. • BLUEJACK n. a kind of oak tree. |
| BOOTJACKS | • bootjacks n. Plural of bootjack. • bootjacks v. Third-person singular simple present indicative form of bootjack. • BOOTJACK n. a device for pulling off boots. |
| FLAPJACKS | • flapjacks n. Plural of flapjack; pancakes. • FLAPJACK n. a kind of biscuit, also SLAPJACK. |
| HIGHJACKS | • highjacks n. Plural of highjack. • highjacks v. Third-person singular simple present indicative form of highjack. • HIGHJACK v. to steal in transit, also HIJACK. |
| JACKSCREW | • jackscrew n. A jack (mechanical lifting device) which is operated by turning a leadscrew. • jackscrew n. A leadscrew; a screw used to translate rotational into linear motion. • jack␣screw n. Alternative form of jackscrew. |
| JACKSHAFT | • jackshaft n. A common mechanical component used to transfer or synchronize rotational force in a machine. • jackshaft n. A wheelless axle used to turn the wheels of a locomotive. • jackshaft v. To transfer or synchronize rotational force by means of a jackshaft. |
| JACKSMELT | • jacksmelt n. Atherinopsis californiensis, an edible neotropical silverside native to the Pacific coast of North America. • JACKSMELT n. a large fish of the Pacific coast of North America. |
| JACKSMITH | • jacksmith n. A smith who makes jacks. • JACKSMITH n. a smith who makes jacks. |
| JACKSNIPE | • jacksnipe n. Lymnocryptes minimus, a migratory small stocky wader, the smallest of the snipes. • JACKSNIPE n. a kind of snipe. |
| JACKSTAFF | • jackstaff n. (Nautical) a short spar, at the bows of a ship, that serves as a flagpole to fly a flag (a jack). • jack-staff n. Alternative spelling of jackstaff. • JACKSTAFF n. a short staff at a ship's bow, on which a jack is hoisted. |
| JACKSTAYS | • jackstays n. Plural of jackstay. • JACKSTAY n. an iron or wooden bar running along the yard of a ship to which sails are fastened. |
| JACKSTONE | • jackstone n. A jack; one of the playing pieces in the game of jacks. • JACKSTONE n. a piece used in the game of jacks. |
| JACKSTRAW | • jackstraw n. (Usually plural) One of the pieces used for the game called jackstraws or pick-up sticks. • jackstraw n. (Dated) An insignificant person. • jackstraw adj. Resembling a bundle of jackstraws that has been strewn on a surface. |
| PUMPJACKS | • pumpjacks n. Plural of pumpjack. • PUMPJACK n. a pumping apparatus at an oil well. |
| SKIPJACKS | • skipjacks n. Plural of skipjack. • SKIPJACK n. a fish that swims near the surface, such as the skipjack tuna. |
| SLAPJACKS | • slapjacks n. Plural of slapjack. • SLAPJACK n. a flat batter cake cooked on a griddle, also FLAPJACK. |
| WHIPJACKS | • whipjacks n. Plural of whipjack. • whip-jacks n. Plural of whip-jack. • WHIPJACK n. a whining beggar posing as a sailor. |