damage vs casualty

damage and casualty both are nouns.

Word	Noun	Adjective	Verb	Adverb
damage	Yes	No	Yes	No
casualty	Yes	No	No	No

As nouns, casualty is a hypernym of damage; that is, casualty is a word with a broader meaning than damage:

damage (noun)	casualty (noun)
the act of damaging something or someone	a decrease of military personnel or equipment
any harm or injury resulting from a violation of a legal right	an accident that causes someone to die
the occurrence of a change for the worse	someone injured or killed in an accident
loss of military equipment	someone injured or killed or captured or missing in a military engagement
the amount of money needed to purchase something

damage (verb)	casualty (verb)
inflict damage upon
suffer or be susceptible to damage