Synonyms of the word 
UNCOMPASSIONATE → HARDHEARTED - MERCILESS - STONYHEARTED - UNFEELING - UNMERCIFUL - UNSYMPATHETIC
uncompassionate
- adj. Not compassionate.
hardhearted
- adj. Lacking in compassion; cold and pitiless.
merciless
- adj. Showing no mercy; cruel and pitiless.
stonyhearted
- adj. Cruel, compassionless, discompassionate, as if having a heart made of stone.
unfeeling
- adj. Without emotion or sympathy.
unmerciful
- adj. not showing mercy.
unsympathetic
- adj. not sympathetic.
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