menadione vs naphthoquinone

menadione and naphthoquinone both are nouns.

Word	Noun	Adjective	Verb	Adverb
menadione	Yes	No	No	No
naphthoquinone	Yes	No	No	No

As nouns, naphthoquinone is a hypernym of menadione; that is, naphthoquinone is a word with a broader meaning than menadione:

menadione: a synthetic chemical compound that is a form of vitamin K, it is an analog of 1,4-naphthoquinone with a methyl group in the 2-position
naphthoquinone: a fat-soluble vitamin that helps in the clotting of blood

Other hypernyms of menadione include antihemorrhagic factor, vitamin K.

menadione (noun)	naphthoquinone (noun)
a synthetic chemical compound that is a form of vitamin K, it is an analog of 1,4-naphthoquinone with a methyl group in the 2-position	a fat-soluble vitamin that helps in the clotting of blood