--- title: "BIP39 Word #1673: speed — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/speed/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #1673 11010001000 # speed — BIP39 word #1673 "**speed**" is word #1673 of the 2048 words in the official BIP39 English wordlist, between [special](/bip39-word/special/) and [spell](/bip39-word/spell/). In a seed phrase it stands for the 11-bit value `11010001000`, decimal index 1672\. /spiːd/ · _noun:_ how fast something moves or happens [Russian](/ru/ "The BIP39 wordlist with Russian translations"): скорость ## 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): [extra](/bip39-word/extra/)[much](/bip39-word/much/)[valve](/bip39-word/valve/)[scissors](/bip39-word/scissors/)[suit](/bip39-word/suit/)[steak](/bip39-word/steak/)[spread](/bip39-word/spread/)[source](/bip39-word/source/)[spice](/bip39-word/spice/)[spend](/bip39-word/spend/)[spell](/bip39-word/spell/) Position Hex Index 0x688 4-Letter Prefix spee ## About "speed" in BIP39 - "speed" has 5 letters, but the first four, **"spee"**, already identify it, because **"spe"** also begins [speak](/bip39-word/speak/), [special](/bip39-word/special/), [spell](/bip39-word/spell/) and [spend](/bip39-word/spend/). - "speed" appears in two of the 24 official English [test vectors](https://github.com/trezor/python-mnemonic/blob/master/vectors.json) of BIP39: vectors #18 (word 14 of 24) and #19 (word 8 of 12). Every official vector passes the [checksum checker](/bip39-checksum-checker/), and [How BIP39 works](/how-bip39-works/) shows how the entropy turns into such words. Official test vector #18 [panda](/bip39-word/panda/) [eyebrow](/bip39-word/eyebrow/) [bullet](/bip39-word/bullet/) [gorilla](/bip39-word/gorilla/) [call](/bip39-word/call/) [smoke](/bip39-word/smoke/) [muffin](/bip39-word/muffin/) [taste](/bip39-word/taste/) [mesh](/bip39-word/mesh/) [discover](/bip39-word/discover/) [soft](/bip39-word/soft/) [ostrich](/bip39-word/ostrich/) [alcohol](/bip39-word/alcohol/) speed [nation](/bip39-word/nation/) [flash](/bip39-word/flash/) [devote](/bip39-word/devote/) [level](/bip39-word/level/) [hobby](/bip39-word/hobby/) [quick](/bip39-word/quick/) [inner](/bip39-word/inner/) [drive](/bip39-word/drive/) [ghost](/bip39-word/ghost/) [inside](/bip39-word/inside/) ## Word #1673 in the Other 9 BIP39 Wordlists [Czech](/czech/) technika [French](/french/) rivière [Italian](/italian/) sinusoide [Japanese](/japanese/) ひんしゅ [Korean](/korean/) 창고 [Portuguese](/portuguese/) resumir [Spanish](/spanish/) salmón [Traditional Chinese](/chinese-traditional/) 繪 [Simplified Chinese](/chinese-simplified/) 绘 ## Similar Words — Check Carefully During Recovery 2 BIP39 words differ from "speed" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [seed](/bip39-word/seed/)[spend](/bip39-word/spend/) Read aloud, "speed" /spiːd/ is one sound away from this word: [speak /spiːk/](/bip39-word/speak/) Words sharing the first three letters "spe": [speak](/bip39-word/speak/)[special](/bip39-word/special/)[spell](/bip39-word/spell/)[spend](/bip39-word/spend/) ## More BIP39 Words Starting with "S" [ #1669 spatial ](/bip39-word/spatial/)[ #1670 spawn ](/bip39-word/spawn/)[ #1671 speak ](/bip39-word/speak/)[ #1672 special ](/bip39-word/special/)[ #1674 spell ](/bip39-word/spell/)[ #1675 spend ](/bip39-word/spend/)[ #1676 sphere ](/bip39-word/sphere/)[ #1677 spice ](/bip39-word/spice/) [View all words starting with "S" ](/bip39-words/s/) ## Seed phrase, key and recovery guides - [Seed Phrase Formats by Network: BIP39 and the Exceptions](/seed-phrase-formats-by-network/) - [BIP39 vs BIP32 vs BIP44: How the Seed Standards Fit Together](/crypto-seed-standards-bip39-vs-bip32-vs-bip44/) - [How to Memorize a Seed Phrase: Color, Story and Palace Methods](/seed-phrase-memory/) [ Full BIP39 Wordlist ](/)