watchword
     n 1: a slogan used to rally support for a cause; "a cry to arms";
          "our watchword will be `democracy'" [syn: {war cry}, {rallying
          cry}, {battle cry}, {cry}]
     2: a secret word or phrase known only to a restricted group;
        "he forgot the password" [syn: {password}, {word}, {parole},
         {countersign}]
Source: WordNet® 2.0