---
title: "BIP39 Words Starting with J — 20 Mnemonic Seed Phrase Words"
url: "https://bip39-phrase.com/bip39-words/j/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

# BIP39 Words Starting with J (20 words)

The 20 BIP39 words that start with J run from #953 [jacket](/bip39-word/jacket/) to #972 [just](/bip39-word/just/) in the English wordlist: indexes 952 to 971, or **01110111000** to **01111001011** in binary, so all of them begin with the bits 0111\. That is 1.0% of the 2048 words, the 21st-largest of the 25 letter groups. Word length goes from 3 letters ([jar](/bip39-word/jar/), [job](/bip39-word/job/) and [joy](/bip39-word/joy/)) to 7 ([jealous](/bip39-word/jealous/) and [journey](/bip39-word/journey/)).

Two three-letter beginnings are shared by two or more words; the largest is **"jun"**, with 3 words: [jungle](/bip39-word/jungle/), [junior](/bip39-word/junior/) and [junk](/bip39-word/junk/). The 5 words in these groups need their first four letters to be told apart, while 15 are identified by the first three.

Five of the 20 words have look-alikes one letter away, such as [job](/bip39-word/job/) and [joy](/bip39-word/joy/) or [jar](/bip39-word/jar/) and [bar](/bip39-word/bar/); all pairs are listed below. Read aloud, 6 pairs differ by a single sound, for example [jar](/bip39-word/jar/) /ʤɑː/ and [joy](/bip39-word/joy/) /ʤɔɪ/. Two spellings are shared with the [French BIP39 list](/french/), at different indexes: [jaguar](/bip39-word/jaguar/) and [junior](/bip39-word/junior/). Two of the words appear in the official BIP39 test vectors: [join](/bip39-word/join/) and [junior](/bip39-word/junior/).

## All 20 BIP39 words starting with J

| #   | Word                            | Binary      | IPA       | Prefix |
| --- | ------------------------------- | ----------- | --------- | ------ |
| 953 | [jacket](/bip39-word/jacket/)   | 01110111000 | /ˈʤækɪt/  | jack   |
| 954 | [jaguar](/bip39-word/jaguar/)   | 01110111001 | /ˈʤæɡjuə/ | jagu   |
| 955 | [jar](/bip39-word/jar/)         | 01110111010 | /ʤɑː/     | jar    |
| 956 | [jazz](/bip39-word/jazz/)       | 01110111011 | /ʤæz/     | jazz   |
| 957 | [jealous](/bip39-word/jealous/) | 01110111100 | /ˈʤɛləs/  | jeal   |
| 958 | [jeans](/bip39-word/jeans/)     | 01110111101 | /ʤiːnz/   | jean   |
| 959 | [jelly](/bip39-word/jelly/)     | 01110111110 | /ˈʤɛli/   | jell   |
| 960 | [jewel](/bip39-word/jewel/)     | 01110111111 | /ˈʤuːəl/  | jewe   |
| 961 | [job](/bip39-word/job/)         | 01111000000 | /ʤɒb/     | job    |
| 962 | [join](/bip39-word/join/)       | 01111000001 | /ʤɔɪn/    | join   |
| 963 | [joke](/bip39-word/joke/)       | 01111000010 | /ʤəʊk/    | joke   |
| 964 | [journey](/bip39-word/journey/) | 01111000011 | /ˈʤɜːni/  | jour   |
| 965 | [joy](/bip39-word/joy/)         | 01111000100 | /ʤɔɪ/     | joy    |
| 966 | [judge](/bip39-word/judge/)     | 01111000101 | /ˈʤʌʤ/    | judg   |
| 967 | [juice](/bip39-word/juice/)     | 01111000110 | /ʤuːs/    | juic   |
| 968 | [jump](/bip39-word/jump/)       | 01111000111 | /ʤʌmp/    | jump   |
| 969 | [jungle](/bip39-word/jungle/)   | 01111001000 | /ˈʤʌŋgl/  | jung   |
| 970 | [junior](/bip39-word/junior/)   | 01111001001 | /ˈʤuːnjə/ | juni   |
| 971 | [junk](/bip39-word/junk/)       | 01111001010 | /ʤʌŋk/    | junk   |
| 972 | [just](/bip39-word/just/)       | 01111001011 | /ʤʌst/    | just   |

## Similar-looking words to check

 These 8 pairs differ by one letter, with at least one word starting with J. Both words are valid, so a slip between them passes the word check and only the checksum can catch it. 

- [bar](/bip39-word/bar/) [jar](/bip39-word/jar/)
- [boy](/bip39-word/boy/) [joy](/bip39-word/joy/)
- [car](/bip39-word/car/) [jar](/bip39-word/jar/)
- [coin](/bip39-word/coin/) [join](/bip39-word/join/)
- [dust](/bip39-word/dust/) [just](/bip39-word/just/)
- [job](/bip39-word/job/) [joy](/bip39-word/joy/)
- [joy](/bip39-word/joy/) [toy](/bip39-word/toy/)
- [just](/bip39-word/just/) [must](/bip39-word/must/)

[ Full BIP39 Wordlist (all 2048 words) ](/#wordlist)