Japanese persimmon vs kaki

Japanese persimmon and kaki both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese persimmon	Yes	No	No	No
kaki	Yes	No	No	No

As nouns, Japanese persimmon and kaki are synonyms defined as:

Japanese persimmon and kaki: small deciduous Asiatic tree bearing large red or orange edible astringent fruit

Other synonyms of Japanese persimmon include Diospyros kaki.

Japanese persimmon (noun)	kaki (noun)
small deciduous Asiatic tree bearing large red or orange edible astringent fruit	blackish stilt of New Zealand sometimes considered a color phase of the white-headed stilt
	small deciduous Asiatic tree bearing large red or orange edible astringent fruit