ergocalciferol vs cholecalciferol

ergocalciferol and cholecalciferol both are nouns.

Word	Noun	Adjective	Verb	Adverb
ergocalciferol	Yes	No	No	No
cholecalciferol	Yes	No	No	No

As nouns, ergocalciferol and cholecalciferol are synonyms defined as:

ergocalciferol and cholecalciferol: a fat-soluble vitamin that prevents rickets

Other synonyms of ergocalciferol include calciferol, D, viosterol, vitamin D.

ergocalciferol (noun)	cholecalciferol (noun)
a fat-soluble vitamin that prevents rickets	a fat-soluble vitamin that prevents rickets