Official Bip39 Word List Some words are shorter than 4 letters, like the word “act”. Other words are longer than 4 letters, which include “summary”. Just one list of mnemonic can be utilized to build various addresses. This technique of building account was introduced in BIP32 & BIP39 very long https://socialwoot.com/story20192054/bip39-ios-wallet-the-best-side-of-seed-phrase-generator