sharpen vs hone

sharpen is not a noun while hone is a noun.

Word	Noun	Adjective	Verb	Adverb
sharpen	No	No	Yes	No
hone	Yes	No	Yes	No

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

Other hyponyms of sharpen include strap, edge, strop, whet.

sharpen (noun)	hone (noun)
	a whetstone made of fine gritstone; used for sharpening razors
	a tool consisting of a number of fine abrasive slips held in a machine head, rotated and reciprocated to impart a smooth finish to cylinder bores, etc.

sharpen (verb)	hone (verb)
become sharp or sharper	make perfect or complete
make crisp or more crisp and precise	sharpen with a hone
raise the pitch of (musical notes)
put (an image) into focus
make (one's senses) more acute
give a point to
make sharp or sharper
make (images or sounds) sharp or sharper