Citrus aurantium vs marmalade orange

Citrus aurantium and marmalade orange both are nouns.

Word	Noun	Adjective	Verb	Adverb
Citrus aurantium	Yes	No	No	No
marmalade orange	Yes	No	No	No

As nouns, Citrus aurantium and marmalade orange are synonyms defined as:

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

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

Citrus aurantium (noun)	marmalade orange (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