green corn vs Zea mays rugosa

green corn and Zea mays rugosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
green corn	Yes	No	No	No
Zea mays rugosa	Yes	No	No	No

As nouns, green corn and Zea mays rugosa are synonyms defined as:

green corn and Zea mays rugosa: a corn plant developed in order to have young ears that are sweet and suitable for eating

Other synonyms of green corn include sugar corn, sweet corn, sweet corn plant, Zea saccharata.

green corn (noun)	Zea mays rugosa (noun)
corn that can be eaten as a vegetable while still young and soft	a corn plant developed in order to have young ears that are sweet and suitable for eating
a corn plant developed in order to have young ears that are sweet and suitable for eating