Fortunella japonica vs marumi kumquat

Fortunella japonica and marumi kumquat both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fortunella japonica	Yes	No	No	No
marumi kumquat	Yes	No	No	No

As nouns, Fortunella japonica and marumi kumquat are synonyms defined as:

Fortunella japonica and marumi kumquat: shrub bearing round-fruited kumquats

Other synonyms of Fortunella japonica include marumi, round kumquat.

Fortunella japonica (noun)	marumi kumquat (noun)
shrub bearing round-fruited kumquats	shrub bearing round-fruited kumquats