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

• well-placed
• well-pleasing
• well-plighted
• well-preserved
• well-proportioned
• well put on
• well putten on
• well-read
• well-regulated
• well-respected
• well room
• well-rounded
• wells
• well seen
• well-seen
• well-set
• well-set-up
• Wellsian
• well-sinker
• well-sinkers
• well-sinking
• well smack
• well-spent
• well-spoken
• wellspring