antipernicious anemia factor vs vitamin B12

antipernicious anemia factor and vitamin B12 both are nouns.

Word	Noun	Adjective	Verb	Adverb
antipernicious anemia factor	Yes	No	No	No
vitamin B12	Yes	No	No	No

As nouns, antipernicious anemia factor and vitamin B12 are synonyms defined as:

antipernicious anemia factor and vitamin B12: a B vitamin that is used to treat pernicious anemia

Other synonyms of antipernicious anemia factor include cobalamin, cyanocobalamin.

antipernicious anemia factor (noun)	vitamin B12 (noun)
a B vitamin that is used to treat pernicious anemia	a B vitamin that is used to treat pernicious anemia