bluebottle vs Centaurea cyanus

bluebottle and Centaurea cyanus both are nouns.

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

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

bluebottle 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 bluebottle include bachelor's button, cornflower.

bluebottle (noun)	Centaurea cyanus (noun)
blowfly with iridescent blue body; makes a loud buzzing noise in flight	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