Bip39 Dice Some words are shorter than 4 letters, including the word “act”. Other words are more time than four letters, like “abstract”. 1 set of mnemonic may be used to make numerous addresses. This method of generating account was released in BIP32 & BIP39 very long time ago. In https://health-lists.com/story19230693/bip39-passphrase-list-the-fact-about-bip39-that-no-one-is-suggesting