Bip39. use the joined words as a mnemonic sentence. The following table describes the relation in between the Preliminary entropy antelope basket cliff dolphin eagle hearth garden honey island jar kettle lemon moon noodle olive panda queen rainbow storm turtle unicorn velvet window xerox yellow (don't use these seed phrases) https://base-directory.com/listings13093188/bip39-standard-https-linktr-ee-bip39-getting-my-bip39-standalone-to-work