An eighteen-word mnemonic phrase will increase security by including extra words for the sequence. In this article’s an case in point: Should you be Not sure about a particular word's spelling, use the research perform (Ctrl+File on Windows/Command+File on Mac) within the BIP39 word list to discover the precise word. https://nimmansocial.com/story9556877/a-secret-weapon-for-bip39-words-to-numbers