coriander vs coriander seed

coriander and coriander seed both are nouns.

Word	Noun	Adjective	Verb	Adverb
coriander	Yes	No	No	No
coriander seed	Yes	No	No	No

As nouns, coriander and coriander seed are synonyms defined as:

coriander and coriander seed: dried coriander seeds used whole or ground

coriander (noun)	coriander seed (noun)
parsley-like herb used as seasoning or garnish	dried coriander seeds used whole or ground
dried coriander seeds used whole or ground
Old World herb with aromatic leaves and seed resembling parsley