Medicago falcata vs sickle alfalfa

Medicago falcata and sickle alfalfa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Medicago falcata	Yes	No	No	No
sickle alfalfa	Yes	No	No	No

As nouns, Medicago falcata and sickle alfalfa are synonyms defined as:

Medicago falcata and sickle alfalfa: European medic naturalized in North America having yellow flowers and sickle-shaped pods

Other synonyms of Medicago falcata include sickle lucerne, sickle medick.

Medicago falcata (noun)	sickle alfalfa (noun)
European medic naturalized in North America having yellow flowers and sickle-shaped pods	European medic naturalized in North America having yellow flowers and sickle-shaped pods