For words that only have 3 letters, there is no 4th letter. Such as with the word “incorporate”, there are no additional letters afterwards and thus have to be the word "incorporate". The word “addict” is within the BIP39 wordlist however, you would have used “addi” for “addict”. This extra https://bookmark-media.com/story18940718/considerations-to-know-about-bip39-seed-phrase-generator