| Meaning | Explication | Aliases | Taxon | |
|---|---|---|---|---|
| jack (playing card) | lowest court card in a deck of standard playing cards, ranking between the 10 and queen, with an image of a knave or pageboy on it | Artifacts | Show shifts | |
| jackal | any of certain wild canids of the genus Canis, native to the tropical Old World and smaller than a wolf | Animals | Show shifts | |
| jackdaw | European bird (Coloeus monedula) of the crow family, often nesting in church towers and ruins | Animals | Show shifts | |
| jackfruit | tree, Artocarpus heterophyllus, of the Moraceae family, which produces edible fruit, and the large fruit from this tree | N/a | Show shifts | |
| jamb (of a door, window) | side-piece of an opening of a door, window | N/a | Show shifts | |
| January | first month of the Gregorian calendar, following the December of the previous year and preceding February | N/a | Show shifts | |
| Japanese | person living in or coming from Japan, or of Japanese ancestry | Human being | Show shifts | |
| jaw | one of the bones, usually bearing teeth, which form the framework of the mouth | Body parts | Show shifts | |
| jay | bird Garrulus glandarius | N/a | Show shifts | |
| jealous | troubled by possible rivalry in love or suspicious of the beloved person's fidelity | Mental acts and states | Show shifts | |
| jealousy | N/a | Show shifts | ||
| jerboa | Animals | Show shifts | ||
| Jerusalem artichoke | Helianthus tuberosus, native to North America, having yellow flower heads and edible tubers | N/a | Show shifts | |
| jester | N/a | Show shifts | ||
| Jesuit | N/a | Show shifts | ||
| Jesus Christ | Jesus of Nazareth, a first-century Jewish religious preacher from Galilee whom Christians consider to be the son of God and call "Jesus Christ" in the belief that he is the Messiah, and whom Muslims believe to be a prophet | N/a | Show shifts | |
| jewel, precious stone | N/a | Show shifts | ||
| jewelry, precious thing | Artifacts | Show shifts | ||
| Jewish | N/a | Show shifts | ||
| jingle bell | N/a | Show shifts | ||
| John the Baptist | christian saint, The Nativity of John the Baptist is a high-ranking liturgical feast, kept in the Roman Catholic, Anglican, Eastern Orthodox and Lutheran churches. This feast is observed annually on 24 June. | N/a | Show shifts | |
| joiner; cabinetmaker | Human being | Show shifts | ||
| joint, articulation | Body parts | Show shifts | ||
| joke | Abstract entities | Show shifts | ||
| journal, magazine | Artifacts | Show shifts | ||
| joy | Abstract entities | Show shifts | ||
| juice | Natural objects | Show shifts | ||
| July | seventh month of the Gregorian calendar, following June and preceding August | N/a | Show shifts | |
| jumper | N/a | Show shifts | ||
| June | sixth month of the Gregorian calendar, following May and preceding July | N/a | Show shifts | |
| jungle | N/a | Show shifts | ||
| juniper | shrub or tree of the genus Juniperus of the cypress family, which is characterized by pointed, needle-like leaves and aromatic berry-like cone | Plants | Show shifts | |
| Jupiter | Natural objects | Show shifts | ||
| just now | N/a | Show shifts |