combat injury vs loss

combat injury and loss both are nouns.

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

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

Other hypernyms of combat injury include personnel casualty.

combat injury (noun)	loss (noun)
a casualty to military personnel resulting from combat	the act of losing someone or something
	the disadvantage that results from losing something
	military personnel lost by death or capture
	the experience of losing a loved one
	euphemistic expressions for death
	the amount by which the cost of a business exceeds its revenue
	something that is lost
	gradual decline in amount or activity