loss vs combat injury

loss and combat injury both are nouns.

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

As nouns, combat injury is a hyponym of loss; that is, combat injury is a word with a more specific, narrower meaning than loss:

Other hyponyms of loss include injury, wound, sacrifice.

loss (noun)	combat injury (noun)
the act of losing someone or something	a casualty to military personnel resulting from combat
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