injury vs combat injury

injury and combat injury both are nouns.

Word	Noun	Adjective	Verb	Adverb
injury	Yes	No	No	No
combat injury	Yes	No	No	No

As nouns, injury and combat injury are synonyms defined as:

injury and combat injury: a casualty to military personnel resulting from combat

Other synonyms of injury include wound.

injury (noun)	combat injury (noun)
wrongdoing that violates another's rights and is unjustly inflicted	a casualty to military personnel resulting from combat
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