tourniquet vs bandage

tourniquet and bandage both are nouns.

Word	Noun	Adjective	Verb	Adverb
tourniquet	Yes	No	No	No
bandage	Yes	No	Yes	No

As nouns, bandage is a hypernym of tourniquet; that is, bandage is a word with a broader meaning than tourniquet:

tourniquet: bandage that stops the flow of blood from an artery by applying pressure
bandage: a piece of soft material that covers and protects an injured part of the body

Other hypernyms of tourniquet include patch.

tourniquet (noun)	bandage (noun)
bandage that stops the flow of blood from an artery by applying pressure	a piece of soft material that covers and protects an injured part of the body

tourniquet (verb)	bandage (verb)
	dress by covering or binding
	wrap around with something so as to cover or enclose