1. Not capable of being improved on
   - unexcelled, unsurpassed

See also: best

• crown imperial
• crown jewel
• crown jewels
• Crown land
• crown lens
• crown monkey
• crown of thorns
• crown prince
• crown princess
• crown roast
• crown saw
• crown vetch
• crown wart
• crown-of-the-field
• crownbeard
• crowned
• crowned head
• crowning
• crownless
• crownwork
• crozier
• CRP
• CRT
• CRT screen
• cru