nonesuch clover vs yellow trefoil

nonesuch clover and yellow trefoil both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonesuch clover	Yes	No	No	No
yellow trefoil	Yes	No	No	No

As nouns, nonesuch clover and yellow trefoil are synonyms defined as:

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

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

nonesuch clover (noun)	yellow trefoil (noun)
prostrate European herb with small yellow flowers and curved black pods; naturalized in North America	prostrate European herb with small yellow flowers and curved black pods; naturalized in North America