Bip39 Words. Entropy values have to be sourced from a strong source of randomness. This implies flipping a good coin, rolling a good dice, sounds measurements etcetera. Don't use phrases from publications, lyrics from tracks, your birthday or steet tackle, keyboard mashing, or nearly anything you think that is random, https://problogdirectory.com/listings13119913/bip39-standard-https-linktr-ee-bip39-top-bip39-seed-phrase-secrets