jap clover vs japan clover

jap clover and japan clover both are nouns.

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

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

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

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

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