An 18-word mnemonic phrase improves protection by incorporating additional words to the sequence. Right here’s an instance: Standard recovery phrases use a particular list of 2048 words next the BIP39 standard (Bitcoin Enhancement Proposal 39). You'll be able to verify In case your words are Element of the BIP39 list https://baidubookmark.com/story19333841/considerations-to-know-about-bip39-word-list-pdf