vitamin G vs riboflavin

vitamin G and riboflavin both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin G	Yes	No	No	No
riboflavin	Yes	No	No	No

As nouns, vitamin G and riboflavin are synonyms defined as:

vitamin G and riboflavin: a B vitamin that prevents skin lesions and weight loss

Other synonyms of vitamin G include hepatoflavin, lactoflavin, ovoflavin, vitamin B2.

vitamin G (noun)	riboflavin (noun)
a B vitamin that prevents skin lesions and weight loss	a B vitamin that prevents skin lesions and weight loss