knife vs dagger

knife and dagger both are nouns.

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

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

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

knife (noun)	dagger (noun)
edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle	a short knife with a pointed blade used for piercing or stabbing
a weapon with a handle and blade with a sharp point	a character used in printing to indicate a second cross reference or footnote when the asterisk has already been used
any long thin projection that is transient

knife (verb)	dagger (verb)
use a knife on