blunt trauma vs trauma

blunt trauma and trauma both are nouns.

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

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

blunt trauma: injury incurred when the human body hits or is hit by a large outside object (as a car)
trauma: any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury

Other hypernyms of blunt trauma include harm, hurt, injury.

blunt trauma (noun)	trauma (noun)
injury incurred when the human body hits or is hit by a large outside object (as a car)	an emotional wound or shock often having long-lasting effects
	any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury