For words that only have three letters, there's no 4th letter. For example with the word “incorporate”, there are no additional letters afterwards and therefore should be the word "insert". The word “addict” is within the BIP39 wordlist however , you would have applied “addi” for “addict”. You may have https://socialdosa.com/story8668242/little-known-facts-about-bip39-seed-phrase-list