poison camas vs death camas

poison camas and death camas both are nouns.

Word	Noun	Adjective	Verb	Adverb
poison camas	Yes	No	No	No
death camas	Yes	No	No	No

As nouns, death camas is a hypernym of poison camas; that is, death camas is a word with a broader meaning than poison camas:

poison camas: a common perennial death camas; Tennessee to Kansas to Texas
death camas: any of various plants of the genus Zigadenus having glaucous leaves and terminal racemes of mostly white flowers; all are poisonous

Other hypernyms of poison camas include zigadene.

poison camas (noun)	death camas (noun)
a common perennial death camas; Tennessee to Kansas to Texas	any of various plants of the genus Zigadenus having glaucous leaves and terminal racemes of mostly white flowers; all are poisonous