sweeten vs honey

sweeten is not a noun while honey is a noun.

Word	Noun	Adjective	Verb	Adverb
sweeten	No	No	Yes	No
honey	Yes	Yes	Yes	No

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

Other hyponyms of sweeten include saccharify, sugar, candy, glaze, sugarcoat, mull.

sweeten (noun)	honey (noun)
	a sweet yellow liquid produced by bees
	a beloved person; used as terms of endearment

sweeten (adjective)	honey (adjective)
	of something having the color of honey

sweeten (verb)	honey (verb)
make sweeter, more pleasant, or more agreeable	sweeten with honey
make sweeter in taste