monkshood vs helmet flower

monkshood and helmet flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
monkshood	Yes	No	No	No
helmet flower	Yes	No	No	No

As nouns, monkshood and helmet flower are synonyms defined as:

monkshood and helmet flower: a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconite

Other synonyms of monkshood include Aconitum napellus, helmetflower.

monkshood (noun)	helmet flower (noun)
a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconite	a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconite