For words that only have 3 letters, there isn't a 4th letter. One example is with the word “incorporate”, there aren't any much more letters Later on and so must be the word "increase". The word “addict” is in the BIP39 wordlist however , you might have utilized “addi” for https://210list.com/story19378787/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator