saffron vs saffron crocus

saffron and saffron crocus both are nouns.

Word	Noun	Adjective	Verb	Adverb
saffron	Yes	No	No	No
saffron crocus	Yes	No	No	No

As nouns, saffron and saffron crocus are synonyms defined as:

saffron and saffron crocus: Old World crocus having purple or white flowers with aromatic pungent orange stigmas used in flavoring food

Other synonyms of saffron include Crocus sativus.

saffron (noun)	saffron crocus (noun)
a shade of yellow tinged with orange	Old World crocus having purple or white flowers with aromatic pungent orange stigmas used in flavoring food
dried pungent stigmas of the Old World saffron crocus
Old World crocus having purple or white flowers with aromatic pungent orange stigmas used in flavoring food