What is another word for codeword?
Pronunciation: [kˈə͡ʊdwɜːd] (IPA) 
Code words are terms or phrases used to convey a specific meaning among a group of people. There are many synonyms for the term "codeword," including "code phrase," "secret word," "keyword," and "passphrase." Another common synonym is "shibboleth," which originally referred to a Hebrew word used to identify members of opposing tribes, but now refers to any language, behavior, or custom that identifies one group from another. "Watchword," "signal," and "cue" are also often used interchangeably with "codeword." No matter which term is used, the purpose of a codeword remains the same: to convey a message that others cannot understand or intercept.
