garden pea vs garden pea

garden pea and garden pea both are nouns.

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

garden pea (noun)	garden pea (noun)
fresh pea	fresh pea
plant producing peas usually eaten fresh rather than dried	plant producing peas usually eaten fresh rather than dried
the flattened to cylindric inflated multi-seeded fruit of the common pea plant	the flattened to cylindric inflated multi-seeded fruit of the common pea plant