ergocalciferol vs vitamin D

ergocalciferol and vitamin D both are nouns.

Word	Noun	Adjective	Verb	Adverb
ergocalciferol	Yes	No	No	No
vitamin D	Yes	No	No	No

As nouns, ergocalciferol and vitamin D are synonyms defined as:

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

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

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