contusion vs trauma

contusion and trauma both are nouns.

Word	Noun	Adjective	Verb	Adverb
contusion	Yes	No	No	No
trauma	Yes	No	No	No

As nouns, trauma is a hypernym of contusion; that is, trauma is a word with a broader meaning than contusion:

contusion: an injury that doesn't break the skin but results in some discoloration
trauma: any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury

Other hypernyms of contusion include harm, hurt, injury.

contusion (noun)	trauma (noun)
the action of bruising	an emotional wound or shock often having long-lasting effects
an injury that doesn't break the skin but results in some discoloration	any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury