nib vs pen

nib and pen both are nouns.

Word	Noun	Adjective	Verb	Adverb
nib	Yes	No	No	No
pen	Yes	No	Yes	No

nib (noun)	pen (noun)
horny projecting mouth of a bird	female swan
the writing point of a pen	a writing implement with a point from which ink flows
	an enclosure for confining livestock
	a correctional institution for those convicted of major crimes
	a portable enclosure in which babies may be left to play

nib (verb)	pen (verb)
	produce a literary work