| JIGGUMBOB | • jiggumbob n. A worthless trifle or bauble; a gimcrack. • JIGGUMBOB n. a thingamabob; a gewgaw. |
| JOLIOTIUM | • joliotium n. (Chemistry, obsolete) A rejected name for dubnium. • joliotium n. (Chemistry, obsolete) A rejected name for nobelium. • JOLIOTIUM n. a former name for the element dubnium. |
| JUMBOISED | • jumboised v. Simple past tense and past participle of jumboise. • JUMBOISE v. to enlarge a ship using prefabricated sections, also JUMBOIZE. |
| JUMBOISES | • jumboises v. Third-person singular simple present indicative form of jumboise. • JUMBOISE v. to enlarge a ship using prefabricated sections, also JUMBOIZE. |
| JUMBOIZED | • jumboized v. Simple past tense and past participle of jumboize. • JUMBOIZE v. to enlarge a ship using prefabricated sections, also JUMBOISE. |
| JUMBOIZES | • jumboizes v. Third-person singular simple present indicative form of jumboize. • JUMBOIZE v. to enlarge a ship using prefabricated sections, also JUMBOISE. |
| JUMPROPES | • jump␣ropes n. Plural of jump rope. • jump␣ropes v. (Colloquial) third-person singular simple present indicative form of jump rope. • JUMPROPE n. a rope used in children's games for jumping. |
| JUMPSHOTS | • jumpshots n. Plural of jumpshot. • jump␣shots n. Plural of jump shot. • JUMPSHOT n. a type of shot in basketball. |
| JUNKERDOM | • junkerdom n. The policies or attitudes of junkers. • JUNKERDOM n. the office of junker. |
| JURYWOMAN | • jurywoman n. A female juror. • JURYWOMAN n. a woman who serves on a jury. |
| JURYWOMEN | • jurywomen n. Plural of jurywoman. • JURYWOMAN n. a woman who serves on a jury. |
| LONGJUMPS | • long␣jumps n. Plural of long jump. • long␣jumps v. Third-person singular simple present indicative form of long jump. • LONGJUMP v. to jump for distance from a running start. |
| MEGAJOULE | • megajoule n. (Metrology) An SI unit of energy equal to 106 joules. Symbol: MJ. • mega-joule n. One million ( 106 ) joules. Symbol: MJ. • MEGAJOULE n. a million joules. |
| OUTJUMPED | • outjumped v. Simple past tense and past participle of outjump. • OUTJUMP v. to surpass in jumping. |
| OVERJUMPS | • overjumps v. Third-person singular simple present indicative form of overjump. • OVERJUMP v. to jump too far. |
| SHOWJUMPS | • showjumps v. Third-person singular simple present indicative form of showjump. • SHOWJUMP v. to take part in a showjumping competition. |