Bip39 Words. Entropy values need to be sourced from a robust source of randomness. This implies flipping a fair coin, rolling a fair dice, noise measurements etc. Don't use phrases from books, lyrics from tunes, your birthday or steet address, keyboard mashing, or something you think that is random, since https://phrasedirectory.com/listings13081335/bip39-generator-https-linktr-ee-bip39-5-simple-statements-about-bip39-compatible-wallet-explained