Spinacia oleracea vs spinach plant

Spinacia oleracea and spinach plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Spinacia oleracea	Yes	No	No	No
spinach plant	Yes	No	No	No

As nouns, Spinacia oleracea and spinach plant are synonyms defined as:

Spinacia oleracea and spinach plant: southwestern Asian plant widely cultivated for its succulent edible dark green leaves

Other synonyms of Spinacia oleracea include prickly-seeded spinach, spinach.

Spinacia oleracea (noun)	spinach plant (noun)
southwestern Asian plant widely cultivated for its succulent edible dark green leaves	southwestern Asian plant widely cultivated for its succulent edible dark green leaves