For words that only have three letters, there is not any 4th letter. Such as with the word “incorporate”, there aren't any more letters Later on and thus needs to be the word "add". The word “addict” is from the BIP39 wordlist but you would've utilised “addi” for “addict”. bip39-phrase.com https://sitesrow.com/story8845856/the-5-second-trick-for-ledger-seed-phrase-bip39