injury vs spoilage

injury and spoilage both are nouns.

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

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

Other hyponyms of injury include disservice, ill service, ill turn, spoil, spoiling.

injury (noun)	spoilage (noun)
wrongdoing that violates another's rights and is unjustly inflicted	the act of spoiling something by causing damage to it
an act that causes someone or something to receive physical damage	the process of becoming spoiled
an accident that results in physical damage or hurt	the amount that has spoiled
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