ill turn vs injury

ill turn and injury both are nouns.

Word	Noun	Adjective	Verb	Adverb
ill turn	Yes	No	No	No
injury	Yes	No	No	No

As nouns, injury is a hypernym of ill turn; that is, injury is a word with a broader meaning than ill turn:

ill turn (noun)	injury (noun)
an act intended to help that turns out badly	wrongdoing that violates another's rights and is unjustly inflicted
	an act that causes someone or something to receive physical damage
	an accident that results in physical damage or hurt
	a casualty to military personnel resulting from combat
	any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury