watchword
Pronunciation:
/ˈwɒt͡ʃwɜː(ɹ)d//ˈwɒt͡ʃwɜː(ɹ)d/noun
Definitions
A word used as a motto, as expressive of a principle, belief or rule of action; a rallying cry.
Synonyms:bywordcatchwordmantramaximmottoA prearranged reply to the challenge of a sentry or a guard; a password or signal by which friends can be known from enemies.
Synonyms:passphrasepasswordunderword