tocopherol vs antioxidant

tocopherol and antioxidant both are nouns.

Word	Noun	Adjective	Verb	Adverb
tocopherol	Yes	No	No	No
antioxidant	Yes	No	No	No

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

tocopherol: 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 tocopherol include fat-soluble vitamin.

tocopherol (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