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

• unintentionally
• uninterested
• uninteresting
• uninterestingly
• unintermitted
• unintermittedly
• unintermitting
• unintermittingly
• uninterpretable
• uninterrupted
• uninterruptedly
• unintoxicating
• unintroduced
• uninuclear
• uninucleate
• uninured
• uninventive
• uninvested
• uninvestigated
• uninvidious
• uninvited
• uninviting
• uranoplasty
• Uranoscopus
• uranous