uncompassionate vs unsympathetic

uncompassionate and unsympathetic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
uncompassionate	No	Yes	No	No
unsympathetic	No	Yes	No	No

uncompassionate (adjective)	unsympathetic (adjective)
lacking compassion or feeling for others	not sympathetic or disposed toward
	(of characters in literature or drama) tending to evoke antipathetic feelings
	not agreeing with your tastes or expectations
	lacking in sympathy and kindness
	not having an open mind