shibboleth [shibboleths](a word, pronunciation, or custom, distinguishing members of a group, especially as a test) noun [UK: ˈʃɪ.bə.leθ] [US: ˈʃɪ.bə.ˌleθ]
wachtwoordsubstantief {n}
password(word used to gain admittance) noun [UK: ˈpɑː.swɜːd] [US: ˈpæ.ˌswərd]