For words that have only three letters, there is no 4th letter. For example with the word “incorporate”, there isn't any extra letters Later on and so need to be the word "incorporate". The word “addict” is while in the BIP39 wordlist however , you would have employed “addi” for https://bookmarkfly.com/story19050794/top-latest-five-bip39-seed-phrase-mnemonics-generator-urban-news