| JACKHAMMERING | • jackhammering v. Present participle of jackhammer. • JACKHAMMER v. to hammer with a jackhammer. |
| JERRYMANDERING | • jerrymandering v. Present participle of jerrymander. • JERRYMANDER v. to rearrange (voting districts) in the interests of a particular party or candidate, also GERRYMANDER. |
| JIGAMAREE | • jigamaree n. A maneuver or cunning trick. • jigamaree n. A trivial, ridiculous or worthless fancy. • jigamaree n. A thingamabob; an object of uncertain name. |
| JIGAMAREES | • jigamarees n. Plural of jigamaree. • JIGAMAREE n. a whatsit. |
| JIGGERMAST | • jiggermast n. (Nautical) The fourth-tallest mast on a ship with more than three masts; particularly a full-rigged ship. • jigger-mast n. Alternative spelling of jiggermast. • jigger␣mast n. Alternative spelling of jiggermast. |
| JIGGERMASTS | • jiggermasts n. Plural of jiggermast. • jigger-masts n. Plural of jigger-mast. • jigger␣masts n. Plural of jigger mast. |
| JUMARING | • jumaring v. Present participle of jumar. • JUMAR v. to climb using ropes and clips. |
| JUMARRING | • jumarring v. Present participle of jumar. • JUMAR v. to climb using ropes and clips. |
| MAJORETTING | • majoretting n. The dance performance of a majorette. • MAJORETTING n. the practice of performing as majorettes. |
| MAJORETTINGS | • MAJORETTING n. the practice of performing as majorettes. |
| MAJORING | • majoring v. Present participle of major. • MAJOR v. to pursue a specific principal course of study. |
| MEGAPROJECT | • megaproject n. A very large public investment project, especially one costing more than one billion US dollars. • MEGAPROJECT n. a major project or undertaking. |
| MEGAPROJECTS | • megaprojects n. Plural of megaproject. • MEGAPROJECT n. a major project or undertaking. |