For words that have only 3 letters, there's no 4th letter. Such as with the word “increase”, there won't be any a lot more letters Later on and therefore must be the word "incorporate". The word “addict” is from the BIP39 wordlist however, you might have utilized “addi” for “addict”. https://sb-bookmarking.com/story19054858/top-guidelines-of-bip39-word-list-pdf