grassy death camas vs Zigadenus venenosus

grassy death camas and Zigadenus venenosus both are nouns.

Word	Noun	Adjective	Verb	Adverb
grassy death camas	Yes	No	No	No
Zigadenus venenosus	Yes	No	No	No

As nouns, grassy death camas and Zigadenus venenosus are synonyms defined as:

grassy death camas and Zigadenus venenosus: plant of western North America to Mexico; poisonous especially to grazing animals

Other synonyms of grassy death camas include Zigadenus venenosus gramineus.

grassy death camas (noun)	Zigadenus venenosus (noun)
plant of western North America to Mexico; poisonous especially to grazing animals	plant of western North America to Mexico; poisonous especially to grazing animals