folic acid vs folacin

folic acid and folacin both are nouns.

Word	Noun	Adjective	Verb	Adverb
folic acid	Yes	No	No	No
folacin	Yes	No	No	No

As nouns, folic acid and folacin are synonyms defined as:

folic acid and folacin: a B vitamin that is essential for cell growth and reproduction

Other synonyms of folic acid include folate, pteroylglutamic acid, pteroylmonoglutamic acid, vitamin Bc, vitamin M.

folic acid (noun)	folacin (noun)
a B vitamin that is essential for cell growth and reproduction	a B vitamin that is essential for cell growth and reproduction