lucerne vs alfalfa

lucerne and alfalfa both are nouns.

Word	Noun	Adjective	Verb	Adverb
lucerne	Yes	No	No	No
alfalfa	Yes	No	No	No

As nouns, lucerne and alfalfa are synonyms defined as:

lucerne and alfalfa: important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop

Other synonyms of lucerne include Medicago sativa.

lucerne (noun)	alfalfa (noun)
important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop	leguminous plant grown for hay or forage
	important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop