Bowie knife vs knife

Bowie knife and knife both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bowie knife	Yes	No	No	No
knife	Yes	No	Yes	No

As nouns, knife is a hypernym of Bowie knife; that is, knife is a word with a broader meaning than Bowie knife:

Bowie knife: a stout hunting knife with a single edge
knife: edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle

Bowie knife (noun)	knife (noun)
a stout hunting knife with a single edge	edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle
	a weapon with a handle and blade with a sharp point
	any long thin projection that is transient

Bowie knife (verb)	knife (verb)
	use a knife on