knife vs bayonet

knife and bayonet both are nouns.

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

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

knife: a weapon with a handle and blade with a sharp point
bayonet: a knife that can be fixed to the end of a rifle and used as a weapon

Other hyponyms of knife include dagger, sticker, khukuri, machete, matchet, panga, shiv, trench knife, yataghan, kindjal, seax.

As verbs, bayonet is a hyponym of knife; that is, bayonet is a word with a more specific, narrower meaning than knife:

Other hyponyms of knife include poniard.

knife (noun)	bayonet (noun)
edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle	a knife that can be fixed to the end of a rifle and used as a weapon
a weapon with a handle and blade with a sharp point
any long thin projection that is transient

knife (verb)	bayonet (verb)
use a knife on	stab or kill someone with a bayonet