Bip39 Standard. Since the 24th is actually a checksum word, a list of 8 valid applicant words are calculated using the Python script 24thword.py. The BIP39 standard also defines an selection for buyers to incorporate an extended "password" of types to some seed phrase. Know that they're two separate things: https://directoryecho.com/listings615179/bip39-word-list-https-linktr-ee-bip39-not-known-facts-about-bip39-mnemonic-generator