coriander seed vs coriander

coriander seed and coriander both are nouns.

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

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

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

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