---
title: "BIP39 Word #721: foam — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/foam/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #721 01011010000 

# foam — BIP39 word #721

"**foam**" is word #721 of the 2048 words in the official BIP39 English wordlist, between [fly](/bip39-word/fly/) and [focus](/bip39-word/focus/). In a seed phrase it stands for the 11-bit value `01011010000`, decimal index 720\. 

/fəʊm/  · _noun:_ a mass of small bubbles formed on or in a liquid 

[Russian](/ru/ "The BIP39 wordlist with Russian translations"): пена 

## Binary Representation

Four 1-bits and seven 0-bits; 330 of the 2048 indexes have exactly four 1-bits.

One wrong bit turns it into (leftmost bit first):

[sure](/bip39-word/sure/)[borrow](/bip39-word/borrow/)[key](/bip39-word/key/)[energy](/bip39-word/energy/)[faith](/bip39-word/faith/)[fun](/bip39-word/fun/)[fix](/bip39-word/fix/)[force](/bip39-word/force/)[fold](/bip39-word/fold/)[fog](/bip39-word/fog/)[focus](/bip39-word/focus/) 

Position

Hex Index

0x2D0

4-Letter Prefix

foam

## About "foam" in BIP39

- "foam" has 4 letters, but the first three, **"foa"**, already identify it, because **"fo"** also begins 18 other words, among them [focus](/bip39-word/focus/), [fog](/bip39-word/fog/), [foil](/bip39-word/foil/) and [fold](/bip39-word/fold/). Three letters are enough for only 604 of the 2048 words.

## Word #721 in the Other 9 BIP39 Wordlists

[Czech](/czech/) labrador 

[French](/french/) espiègle 

[Italian](/italian/) gabbiano 

[Japanese](/japanese/) さがる 

[Korean](/korean/) 비극 

[Portuguese](/portuguese/) envergar 

[Spanish](/spanish/) fin 

[Traditional Chinese](/chinese-traditional/) 夜 

[Simplified Chinese](/chinese-simplified/) 夜 

## Similar Words — Check Carefully During Recovery

Read aloud, "foam" /fəʊm/ is one sound away from these 5 words: 

[fame /feɪm/](/bip39-word/fame/)[farm /fɑːm/](/bip39-word/farm/)[firm /fɜːm/](/bip39-word/firm/)[home /həʊm/](/bip39-word/home/)[phone /fəʊn/](/bip39-word/phone/) 

## More BIP39 Words Starting with "F"

[ #717 flower ](/bip39-word/flower/)[ #718 fluid ](/bip39-word/fluid/)[ #719 flush ](/bip39-word/flush/)[ #720 fly ](/bip39-word/fly/)[ #722 focus ](/bip39-word/focus/)[ #723 fog ](/bip39-word/fog/)[ #724 foil ](/bip39-word/foil/)[ #725 fold ](/bip39-word/fold/) 

[View all words starting with "F" ](/bip39-words/f/) 

## Seed phrase, key and recovery guides

- [SLIP-39 vs BIP39: Shamir Backup and 20-Word Shares Explained](/slip39-vs-bip39/)
- [Why You Should Never Create Your Own Seed Phrase](/why-you-should-never-create-your-own-seed-phrase/)
- [12 vs 24 Word Seed Phrase: Which Is More Secure?](/12-vs-24-word-seed-phrase/)

[ Full BIP39 Wordlist ](/)