For words that only have three letters, there isn't a 4th letter. As an example with the word “incorporate”, there aren't any far more letters afterwards and so should be the word "incorporate". The word “addict” is during the BIP39 wordlist however, you might have employed “addi” for “addict”. The https://socialmarkz.com/story9381388/top-latest-five-bip39-words-urban-news