vitamin P vs citrin

vitamin P and citrin both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin P	Yes	No	No	No
citrin	Yes	No	No	No

As nouns, vitamin P and citrin are synonyms defined as:

vitamin P and citrin: a vitamin that maintains the resistance of cell and capillary walls to permeation

Other synonyms of vitamin P include bioflavinoid.

vitamin P (noun)	citrin (noun)
a vitamin that maintains the resistance of cell and capillary walls to permeation	a vitamin that maintains the resistance of cell and capillary walls to permeation