marumi kumquat vs Fortunella japonica

marumi kumquat and Fortunella japonica both are nouns.

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

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

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

Other synonyms of marumi kumquat include marumi, round kumquat.

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