blue devil vs Echium vulgare

blue devil and Echium vulgare both are nouns.

Word	Noun	Adjective	Verb	Adverb
blue devil	Yes	No	No	No
Echium vulgare	Yes	No	No	No

As nouns, blue devil and Echium vulgare are synonyms defined as:

blue devil and Echium vulgare: a coarse prickly European weed with spikes of blue flowers; naturalized in United States

Other synonyms of blue devil include blue thistle, blueweed, viper's bugloss.

blue devil (noun)	Echium vulgare (noun)
the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic	a coarse prickly European weed with spikes of blue flowers; naturalized in United States
a coarse prickly European weed with spikes of blue flowers; naturalized in United States