antipernicious anemia factor vs B

antipernicious anemia factor and B both are nouns.

Word	Noun	Adjective	Verb	Adverb
antipernicious anemia factor	Yes	No	No	No
B	Yes	No	No	No

As nouns, B is a hypernym of antipernicious anemia factor; that is, B is a word with a broader meaning than antipernicious anemia factor:

antipernicious anemia factor: a B vitamin that is used to treat pernicious anemia
B: originally thought to be a single vitamin but now separated into several B vitamins

Other hypernyms of antipernicious anemia factor include B-complex vitamin, B complex, B vitamin, vitamin B, vitamin B complex.

antipernicious anemia factor (noun)	B (noun)
a B vitamin that is used to treat pernicious anemia	aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
	the blood group whose red cells carry the B antigen
	the 2nd letter of the Roman alphabet
	a logarithmic unit of sound intensity equal to 10 decibels
	a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
	originally thought to be a single vitamin but now separated into several B vitamins