Centaurea cyanus vs bluebottle

Centaurea cyanus and bluebottle both are nouns.

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

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

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

Other synonyms of Centaurea cyanus include bachelor's button, cornflower.

Centaurea cyanus (noun)	bluebottle (noun)
an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers	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