vitamin E vs antioxidant

vitamin E and antioxidant both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin E	Yes	No	No	No
antioxidant	Yes	No	No	No

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

vitamin E: a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
antioxidant: substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides

Other hypernyms of vitamin E include fat-soluble vitamin.

vitamin E (noun)	antioxidant (noun)
a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body	substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides