vitamin K vs naphthoquinone

vitamin K and naphthoquinone both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin K	Yes	No	No	No
naphthoquinone	Yes	No	No	No

As nouns, vitamin K and naphthoquinone are synonyms defined as:

vitamin K and naphthoquinone: a fat-soluble vitamin that helps in the clotting of blood

Other synonyms of vitamin K include antihemorrhagic factor.

vitamin K (noun)	naphthoquinone (noun)
a fat-soluble vitamin that helps in the clotting of blood	a fat-soluble vitamin that helps in the clotting of blood