black medick vs hop clover

black medick and hop clover both are nouns.

Word	Noun	Adjective	Verb	Adverb
black medick	Yes	No	No	No
hop clover	Yes	No	No	No

As nouns, black medick and hop clover are synonyms defined as:

black medick and hop clover: prostrate European herb with small yellow flowers and curved black pods; naturalized in North America

Other synonyms of black medick include Medicago lupulina, nonesuch clover, yellow trefoil.

black medick (noun)	hop clover (noun)
prostrate European herb with small yellow flowers and curved black pods; naturalized in North America	clover native to Ireland with yellowish flowers; often considered the true or original shamrock
	prostrate European herb with small yellow flowers and curved black pods; naturalized in North America