Citrus aurantium vs bigarade

Citrus aurantium and bigarade both are nouns.

Word	Noun	Adjective	Verb	Adverb
Citrus aurantium	Yes	No	No	No
bigarade	Yes	No	No	No

As nouns, Citrus aurantium and bigarade are synonyms defined as:

Citrus aurantium and bigarade: any of various common orange trees yielding sour or bitter fruit; used as grafting stock

Other synonyms of Citrus aurantium include bitter orange, bitter orange tree, marmalade orange, Seville orange, sour orange.

Citrus aurantium (noun)	bigarade (noun)
any of various common orange trees yielding sour or bitter fruit; used as grafting stock	any of various common orange trees yielding sour or bitter fruit; used as grafting stock