There are in total 37 words starting with the letter J and 13 letters in length.
| Word | Length |
|---|---|
| jabberwockies | 13 |
| jackhammering | 13 |
| jaloallofanes | 13 |
| japonaiseries | 13 |
| jargonisation | 13 |
| jargonization | 13 |
| jawbreakingly | 13 |
| jealousnesses | 13 |
| jejunostomies | 13 |
| jellification | 13 |
| jellygraphing | 13 |
| jerrymandered | 13 |
| jerrymanderer | 13 |
| jetpropulsion | 13 |
| jickajoggings | 13 |
| jitterbugging | 13 |
| jitterinesses | 13 |
| joblessnesses | 13 |
| jointednesses | 13 |
| jollification | 13 |
| joylessnesses | 13 |
| judgementally | 13 |
| judgmatically | 13 |
| judiciousness | 13 |
| juglandaceous | 13 |
| jurisconsults | 13 |
| jurisdictions | 13 |
| jurisprudence | 13 |
| jurisprudents | 13 |
| justicialisms | 13 |
| justiciarship | 13 |
| justification | 13 |
| justificative | 13 |
| justificators | 13 |
| justificatory | 13 |
| juvenescences | 13 |
| juxtaposition | 13 |