Pisum arvense vs field pea

Pisum arvense and field pea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pisum arvense	Yes	No	No	No
field pea	Yes	No	No	No

As nouns, Pisum arvense and field pea are synonyms defined as:

Pisum arvense and field pea: variety of pea plant native to the Mediterranean region and North Africa and widely grown especially for forage

Other synonyms of Pisum arvense include Austrian winter pea, field-pea plant, Pisum sativum arvense.

Pisum arvense (noun)	field pea (noun)
variety of pea plant native to the Mediterranean region and North Africa and widely grown especially for forage	coarse small-seeded pea often used as food when young and tender
	variety of pea plant native to the Mediterranean region and North Africa and widely grown especially for forage
	seed of the field pea plant