obedient plant vs false dragon head

obedient plant and false dragon head both are nouns.

Word	Noun	Adjective	Verb	Adverb
obedient plant	Yes	No	No	No
false dragon head	Yes	No	No	No

As nouns, obedient plant and false dragon head are synonyms defined as:

obedient plant and false dragon head: North American plant having a spike of two-lipped pink or white flowers

Other synonyms of obedient plant include false dragonhead, Physostegia virginiana.

obedient plant (noun)	false dragon head (noun)
North American plant having a spike of two-lipped pink or white flowers	North American plant having a spike of two-lipped pink or white flowers