shibboleth /shibˈə-leth/

1. The criterion, catchword or catchphrase of a group, party or sect by which members may be identified
2. A slogan
3. A peculiarity of speech
4. The Gileadite test-word to distinguish an Ephraimite, who could not pronounce sh (from Bible, Judges 12.5–6)
5. Any such test

• concrete poetry
• concretes
• concrete steel
• concreting
• concretion
• concretionary
• concretions
• concretisation
• concretisations
• concretise
• concretised
• concretises
• concretising
• concretism
• concretisms
• concretist
• concretists
• concretive
• concretization
• concretizations
• concretize
• concretized
• concretizes
• concretizing
• concrew