cornflower vs Centaurea cyanus

cornflower and Centaurea cyanus both are nouns.

Word	Noun	Adjective	Verb	Adverb
cornflower	Yes	No	No	No
Centaurea cyanus	Yes	No	No	No

As nouns, cornflower and Centaurea cyanus are synonyms defined as:

cornflower and Centaurea cyanus: an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers

Other synonyms of cornflower include bachelor's button, bluebottle.

cornflower (noun)	Centaurea cyanus (noun)
an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers	an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers
plant of southern and southeastern United States grown for its yellow flowers that can be dried