spring vetch vs Vicia sativa

spring vetch and Vicia sativa both are nouns.

Word	Noun	Adjective	Verb	Adverb
spring vetch	Yes	No	No	No
Vicia sativa	Yes	No	No	No

As nouns, spring vetch and Vicia sativa are synonyms defined as:

spring vetch and Vicia sativa: herbaceous climbing plant valuable as fodder and for soil-building

spring vetch (noun)	Vicia sativa (noun)
herbaceous climbing plant valuable as fodder and for soil-building	herbaceous climbing plant valuable as fodder and for soil-building
bushy European perennial having nodding racemose violet-blue flowers