red baneberry vs cohosh

red baneberry and cohosh both are nouns.

Word	Noun	Adjective	Verb	Adverb
red baneberry	Yes	No	No	No
cohosh	Yes	No	No	No

As nouns, cohosh is a hypernym of red baneberry; that is, cohosh is a word with a broader meaning than red baneberry:

red baneberry: North American perennial herb with alternately compound leaves and racemes of small white flowers followed by bright red oval poisonous berries
cohosh: a plant of the genus Actaea having acrid poisonous berries

Other hypernyms of red baneberry include baneberry, herb Christopher.

red baneberry (noun)	cohosh (noun)
North American perennial herb with alternately compound leaves and racemes of small white flowers followed by bright red oval poisonous berries	a plant of the genus Actaea having acrid poisonous berries