For words that only have three letters, there is absolutely no 4th letter. For instance with the word “increase”, there isn't any extra letters Later on and so have to be the word "incorporate". The word “addict” is inside the BIP39 wordlist however , you would have utilized “addi” for https://loanbookmark.com/story19102001/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting