"watchword" in the noun sense
1. war cry, rallying cry, battle cry, cry, watchword
a slogan used to rally support for a cause
"a cry to arms"
"our watchword will be `democracy'"
2. password, watchword, word, parole, countersign
a secret word or phrase known only to a restricted group
"he forgot the password"
Source: WordNet® (An amazing lexical database of English)
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