vitamin vs alimentation

vitamin and alimentation both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin	Yes	No	No	No
alimentation	Yes	No	No	No

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

vitamin: any of a group of organic substances essential in small quantities to normal metabolism
alimentation: a source of materials to nourish the body

Other hypernyms of vitamin include aliment, nourishment, nutriment, nutrition, sustenance, victuals.

vitamin (noun)	alimentation (noun)
any of a group of organic substances essential in small quantities to normal metabolism	the act of supplying food and nourishment
	a source of materials to nourish the body