heath pea vs tuberous vetch

heath pea and tuberous vetch both are nouns.

Word	Noun	Adjective	Verb	Adverb
heath pea	Yes	No	No	No
tuberous vetch	Yes	No	No	No

As nouns, heath pea and tuberous vetch are synonyms defined as:

heath pea and tuberous vetch: European herb bearing small tubers used for food and in Scotland to flavor whiskey

Other synonyms of heath pea include earth-nut pea, earthnut pea, Lathyrus tuberosus.

heath pea (noun)	tuberous vetch (noun)
European herb bearing small tubers used for food and in Scotland to flavor whiskey	European herb bearing small tubers used for food and in Scotland to flavor whiskey