Bip39 Api. The seed phrase functions as being a backup on the wallet and can be used to restore the wallet and entry the money in case of decline or harm to the original wallet. These words are pulled from a specific list of 2048 words. They are available here https://alexisjvfrc.scrappingwiki.com/1101975/the_anatomy_of_a_bip39_phrase_entropy_words_and_phrases_and_protection