1. Herb of northwestern America having green-and-purple bell-shaped flowers
   - mission bells, rice-grain fritillary, Fritillaria affinis, Fritillaria lanceolata

Type of: checkered lily [US], fritillary

• unforthcoming
• unfortunate
• unfortunate person
• unfortunately
• unfounded
• unframed
• unfree
• unfreeze
• unfrequented
• unfretted
• unfriended
• unfriendliness
• unfriendly
• unfrightened
• unfrock
• unfrosted
• unfrozen
• unfruitful
• unfueled
• unfuelled
• unfulfillable
• unfulfilled
• unfunctional
• unfunded
• unfunny