panga vs knife

panga and knife both are nouns.

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

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

panga (noun)	knife (noun)
a large heavy knife used as a weapon or for cutting vegetation	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

panga (verb)	knife (verb)
	use a knife on