marumi kumquat vs round kumquat

marumi kumquat and round kumquat both are nouns.

Word	Noun	Adjective	Verb	Adverb
marumi kumquat	Yes	No	No	No
round kumquat	Yes	No	No	No

As nouns, marumi kumquat and round kumquat are synonyms defined as:

Other synonyms of marumi kumquat include Fortunella japonica, marumi.

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