saffron vs Crocus sativus

saffron and Crocus sativus both are nouns.

Word	Noun	Adjective	Verb	Adverb
saffron	Yes	No	No	No
Crocus sativus	Yes	No	No	No

As nouns, saffron and Crocus sativus are synonyms defined as:

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

Other synonyms of saffron include saffron crocus.

saffron (noun)	Crocus sativus (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