pea plant vs pea

pea plant and pea both are nouns.

Word	Noun	Adjective	Verb	Adverb
pea plant	Yes	No	No	No
pea	Yes	No	No	No

As nouns, pea plant and pea are synonyms defined as:

pea plant and pea: a leguminous plant of the genus Pisum with small white flowers and long green pods containing edible green seeds

pea plant (noun)	pea (noun)
a leguminous plant of the genus Pisum with small white flowers and long green pods containing edible green seeds	seed of a pea plant used for food
	a leguminous plant of the genus Pisum with small white flowers and long green pods containing edible green seeds
	the fruit or seed of a pea plant