A "strong password" is a combination of letters, numbers, and symbols that are difficult to guess or crack. Synonyms for "strong password" include secure password, robust password, complex password, uncrackable password, and fortified password. A secure password is resilient against password-guessing attacks and is difficult to crack by hackers. A robust password is strong and sturdy, making it resistant against brute force attacks. A complex password is characterized by its length and mixture of different characters. An uncrackable password is virtually immune against cracking software, while a fortified password is well-protected and secure from any potential threats. Choosing a strong password can help to protect personal information and prevent unauthorized access.