Melilotus alba vs sweet clover

Melilotus alba and sweet clover both are nouns.

Word	Noun	Adjective	Verb	Adverb
Melilotus alba	Yes	No	No	No
sweet clover	Yes	No	No	No

As nouns, sweet clover is a hypernym of Melilotus alba; that is, sweet clover is a word with a broader meaning than Melilotus alba:

Melilotus alba: biennial plant; valuable honey plant
sweet clover: erect annual or biennial plant grown extensively especially for hay and soil improvement

Other hypernyms of Melilotus alba include melilot, melilotus.

Melilotus alba (noun)	sweet clover (noun)
biennial plant; valuable honey plant	erect annual or biennial plant grown extensively especially for hay and soil improvement