pigeon berry vs pokeweed

pigeon berry and pokeweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
pigeon berry	Yes	No	No	No
pokeweed	Yes	No	No	No

As nouns, pokeweed is a hypernym of pigeon berry; that is, pokeweed is a word with a broader meaning than pigeon berry:

pigeon berry: tall coarse perennial American herb having small white flowers followed by blackish-red berries on long drooping racemes; young fleshy stems are edible; berries and root are poisonous
pokeweed: perennial of the genus Phytolacca

pigeon berry (noun)	pokeweed (noun)
tall coarse perennial American herb having small white flowers followed by blackish-red berries on long drooping racemes; young fleshy stems are edible; berries and root are poisonous	perennial of the genus Phytolacca