marumi vs Fortunella japonica

marumi and Fortunella japonica both are nouns.

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

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

Other synonyms of marumi include marumi kumquat, round kumquat.

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