jap clover vs japanese clover

jap clover and japanese clover both are nouns.

Word	Noun	Adjective	Verb	Adverb
jap clover	Yes	No	No	No
japanese clover	Yes	No	No	No

As nouns, jap clover and japanese clover are synonyms defined as:

jap clover and japanese clover: an annual of tropical Asia naturalized in United States

Other synonyms of jap clover include japan clover, Lespedeza striata.

jap clover (noun)	japanese clover (noun)
an annual of tropical Asia naturalized in United States	an annual of tropical Asia naturalized in United States