cilantro vs coriander plant

cilantro and coriander plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
cilantro	Yes	No	No	No
coriander plant	Yes	No	No	No

As nouns, cilantro and coriander plant are synonyms defined as:

cilantro and coriander plant: Old World herb with aromatic leaves and seed resembling parsley

Other synonyms of cilantro include Chinese parsley, coriander, Coriandrum sativum.

cilantro (noun)	coriander plant (noun)
parsley-like herb used as seasoning or garnish	Old World herb with aromatic leaves and seed resembling parsley
Old World herb with aromatic leaves and seed resembling parsley