Bip39 Tool Github Some words are shorter than four letters, like the word “act”. Other words are longer than four letters, including “abstract”. 1 set of mnemonic can be used to build multiple addresses. This process of producing account was launched in BIP32 & BIP39 long time back. Right here, https://bookmarkick.com/story18665283/bip39-entropy-to-mnemonic-seed-phrase-generator-no-further-a-mystery