1. Without mercy or pity
   - pitiless, remorseless, ruthless

See also: merciless, unmerciful

• ocarina
• Occam
• Occam's Razor
• occasion
• occasional
• occasionalism
• occasionally
• occasions
• occident
• occidental
• occidentalise
• occidentalism
• occidentalize
• occipital
• occipital bone
• occipital cortex
• occipital gyrus
• occipital lobe
• occipital protuberance
• occipital vein
• occipitomastoid suture
• occiput
• Occitan
• occlude
• occluded