vitamin G vs vitamin B2

vitamin G and vitamin B2 both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin G	Yes	No	No	No
vitamin B2	Yes	No	No	No

As nouns, vitamin G and vitamin B2 are synonyms defined as:

vitamin G and vitamin B2: a B vitamin that prevents skin lesions and weight loss

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

vitamin G (noun)	vitamin B2 (noun)
a B vitamin that prevents skin lesions and weight loss	a B vitamin that prevents skin lesions and weight loss