garden pea vs snow pea

garden pea and snow pea both are nouns.

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

As nouns, snow pea is a hyponym of garden pea; that is, snow pea is a word with a more specific, narrower meaning than garden pea:

Other hyponyms of garden pea include sugar pea, sugar snap pea, split-pea.

garden pea (noun)	snow pea (noun)
fresh pea	green peas with flat edible pods
plant producing peas usually eaten fresh rather than dried	variety of pea plant producing peas having thin flat edible pods
the flattened to cylindric inflated multi-seeded fruit of the common pea plant