writing vs pen

writing and pen both are nouns.

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

writing (noun)	pen (noun)
the activity of putting something in written form	female swan
the act of creating written works	a writing implement with a point from which ink flows
the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect)	an enclosure for confining livestock
letters or symbols that are written or imprinted on a surface to represent the sounds or words of a language	a correctional institution for those convicted of major crimes
(usually plural) the collected work of an author	a portable enclosure in which babies may be left to play

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