J
| Mondlango | English |
| ja | certainly |
| jado | jade |
| jakalo | jackal |
| jako | jacket |
| Jamayko | Jamaica |
| jamo | jam |
| januaro | January |
| Japanio | Japan |
| Japano | Japanese |
| jargono | jargon |
| jasmeno | jasmine |
| jazo | jazz |
| jela | jealous |
| jelatino | gelatin |
| jemi | groan |
| jeneraxo | generation |
| jeneralo | general (n.) |
| jenerala | general (adj.) |
| jeneri | generate |
| jenera | genital |
| jeneratoro | generator |
| jeneso | genesis |
| jeni | bother |
| jentla | gentle |
| jentlulo | gentleman |
| jerki | jerk |
| Jermano | German(including Austria etc) |
| jermo | germ |
| Jerusalemo | Jerusalem |
| Jesuo | Jesus |
| jeti | cast |
| ji | it |
| jia | its |
| jigo | jig |
| jingli | jingle |
| jinjo | ginger |
| jino | jeans |
| jipo | jeep |
| jipso | gipsy |
| jirafo | giraffe |
| jobo | job |
| joki | joke |
| jokio | jockey |
| joya | joyous |
| joyni | join |
| ju | they |
| jua | their |
| jubileo | jubilee |
| Judo | Jew |
| Judismo | Judaism |
| juji | judge |
| juja | judicial |
| jujeyo | law court |
| jujisto | judge |
| jugli | juggle |
| julio | July |
| jumo | twin |
| junglo | jungle |
| junia | junior |
| junkto | junction |
| juno | June |
| Jupitero | Jupiter |
| jupo | skirt |
| jurisdikto | jurisdiction |
| jurnalo | newspaper |
| jurnalisto | journalist |
| jurno | day (not night) |
| juro | law |
| juraro | jury |
| juroro | juror |
| juristo | jurist |
| jus | just now |
| justa | just |
| justo | justice |
| juto | jute |
| juwelo | jewel |