For words that have only 3 letters, there's no 4th letter. Such as with the word “increase”, there are no far more letters afterwards and thus must be the word "incorporate". The word “addict” is within the BIP39 wordlist but you might have utilized “addi” for “addict”. Mnemonic words illustrations https://mylittlebookmark.com/story4611427/examine-this-report-on-bip39-passphrase