Bip39 Seed Phrase Word List. From this level ahead the seed could be created on paper or spoken above phone which opened up new, Bodily means of backing up the seed (multiple paper copies in several locations, durable copies on metal plates with additional security from fire/flood and so forth.). https://andrepblvf.wikiannouncing.com/5708787/the_anatomy_of_a_bip39_phrase_entropy_words_and_stability