vitamin C vs ascorbic acid

vitamin C and ascorbic acid both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin C	Yes	No	No	No
ascorbic acid	Yes	No	No	No

As nouns, vitamin C and ascorbic acid are synonyms defined as:

vitamin C and ascorbic acid: a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy

Other synonyms of vitamin C include C.

vitamin C (noun)	ascorbic acid (noun)
a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy	a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy