| JALAPINS | • jalapins n. Plural of jalapin. • JALAPIN n. a glucoside resin, one of the purgative principles of jalap. |
| JALOPIES | • jalopies n. Plural of jalopy. • JALOPY n. a decrepit car, also JALOPPY. |
| JAMPANIS | • jampanis n. Plural of jampani. • JAMPANI n. (Bengali) an Indian sedan chair bearer, also JAMPANEE. |
| JAPANISE | • japanise v. Alternative spelling of japanize. • Japanise v. Alternative form of Japanize. • JAPANISE v. to make Japanese, also JAPANIZE. |
| JAPERIES | • japeries n. Plural of japery. • JAPERY n. jesting, buffoonery. |
| JASPISES | • JASPIS n. jasper, also JASP. |
| JIMPIEST | • JIMPY adj. (Scots) neat. |
| JIMPNESS | • jimpness n. The quality of being jimp. • JIMPNESS n. (Scots) slenderness. |
| JIPYAPAS | • JIPYAPA n. (Spanish) a palmlike tree of tropical America, also JIPIJAPA. |
| JUMPIEST | • jumpiest adj. Superlative form of jumpy: most jumpy. • JUMPY adj. nervy. |
| JUMPINGS | • jumpings n. Plural of jumping. • JUMPING n. the act of jumping. |
| JUMPSIES | • JUMPSIES n. a game involving jumping over a taut rope. |
| JUMPSUIT | • jumpsuit n. A one-piece item of clothing originally used by parachutists. • jumpsuit n. A similar item of clothing used for outdoor sports such as skiing. • jump␣suit n. Alternative form of jumpsuit. |
| JUNIPERS | • junipers n. Plural of juniper. • JUNIPER n. an evergreen coniferous shrub whose berries are used in making gin. |
| KIPUNJIS | • kipunjis n. Plural of kipunji. • KIPUNJI n. a long-tailed Tanzanian monkey with a crest of erect hair. |
| RAJASHIP | • rajaship n. The role or office of raja. • RAJASHIP n. the office of a raja, also RAJAHSHIP. |
| SKIPJACK | • skipjack n. Any of several not closely related fish. • skipjack n. (Obsolete) An upstart. • skipjack n. An elaterid; a click beetle. |