Bip39 Trezor Some words are shorter than 4 letters, such as the word “act”. Other words are extended than four letters, for example “summary”. A lot of people back up their wallet seed phrases or non-public keys on paper, regional equipment like hardware wallets or USBs, or from the cloud. https://seolistlinks.com/story19851140/bip39-standard-word-list-rumored-buzz-on-bip39-phrase