injury vs spoiling

injury and spoiling both are nouns.

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

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

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

injury (noun)	spoiling (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
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