I chose "bazaar" as a medium difficulty word because:
1. It's 6 letters long (within 4-10 letter requirement)
2. It uses only standard English letters
3. It's a real English word meaning a marketplace
4. It's moderately challenging because:
   - Has uncommon letter 'z' used twice
   - Contains multiple 'a's
   - Not an everyday word but still familiar to most English speakers
5. It follows all rules (no hyphens, spaces, or special characters)