For words that have only 3 letters, there isn't a 4th letter. One example is with the word “incorporate”, there won't be any a lot more letters Later on and so needs to be the word "add". The word “addict” is while in the BIP39 wordlist but you would've utilised https://bookmarksden.com/story18961645/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39