Scure Bip39 Npm Some words are shorter than four letters, such as the word “act”. Other words are extended than 4 letters, including “abstract”. Just one list of mnemonic may be used to produce several addresses. This method of creating account was launched in BIP32 & BIP39 long time back. https://greatbookmarking.com/story18731311/24-word-seed-phrase-generator-little-known-facts-about-seed-phrase-generator