WATCHWORD Meaning of WATCHWORD in English noun 1.Synonyms: password 1, countersign, word 2.Synonyms: password 3, word 3.Synonyms: catchword , byword, catchphrase, phrase, shibboleth, slogan Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003