vitamin A2 vs axerophthol

vitamin A2 and axerophthol both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin A2	Yes	No	No	No
axerophthol	Yes	No	No	No

As nouns, axerophthol is a hypernym of vitamin A2; that is, axerophthol is a word with a broader meaning than vitamin A2:

vitamin A2: a viscous alcohol that is less active in mammals than is vitamin A1
axerophthol: any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

Other hypernyms of vitamin A2 include A, antiophthalmic factor, vitamin A.

vitamin A2 (noun)	axerophthol (noun)
a viscous alcohol that is less active in mammals than is vitamin A1	any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes