menadione vs vitamin K3

menadione and vitamin K3 both are nouns.

Word	Noun	Adjective	Verb	Adverb
menadione	Yes	No	No	No
vitamin K3	Yes	No	No	No

As nouns, menadione and vitamin K3 are synonyms defined as:

menadione and vitamin K3: 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

menadione (noun)	vitamin K3 (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 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