Dracocephalum parviflorum vs dragonhead

Dracocephalum parviflorum and dragonhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dracocephalum parviflorum	Yes	No	No	No
dragonhead	Yes	No	No	No

As nouns, Dracocephalum parviflorum and dragonhead are synonyms defined as:

Dracocephalum parviflorum and dragonhead: American herb having sharply serrate lanceolate leaves and spikes of blue to violet flowers

Other synonyms of Dracocephalum parviflorum include dragon's head.

Dracocephalum parviflorum (noun)	dragonhead (noun)
American herb having sharply serrate lanceolate leaves and spikes of blue to violet flowers	American herb having sharply serrate lanceolate leaves and spikes of blue to violet flowers