ovoflavin vs vitamin B

ovoflavin and vitamin B both are nouns.

Word	Noun	Adjective	Verb	Adverb
ovoflavin	Yes	No	No	No
vitamin B	Yes	No	No	No

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

ovoflavin: a B vitamin that prevents skin lesions and weight loss
vitamin B: originally thought to be a single vitamin but now separated into several B vitamins

Other hypernyms of ovoflavin include B-complex vitamin, B, B complex, B vitamin, vitamin B complex.

ovoflavin (noun)	vitamin B (noun)
a B vitamin that prevents skin lesions and weight loss	originally thought to be a single vitamin but now separated into several B vitamins