vitamin D vs cholecalciferol

vitamin D and cholecalciferol both are nouns.

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

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

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

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

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