1. Not capable of being changed or altered
   - unalterable

See also: final, incurable, last

• curvilinear correlation
• curvilinear regression
• curving
• curvy
• Cusco
• cuscus
• Cuscuta
• Cuscuta gronovii
• cusec
• cush-cush
• cushat
• cushaw
• Cushing
• Cushing's disease
• Cushing's syndrome
• cushion
• cushion calamint
• cushion flower
• cushioned
• cushioning
• cushiony
• Cushitic
• cushy
• cusk
• cusk-eel