ghost weed vs Euphorbia marginata

ghost weed and Euphorbia marginata both are nouns.

Word	Noun	Adjective	Verb	Adverb
ghost weed	Yes	No	No	No
Euphorbia marginata	Yes	No	No	No

As nouns, ghost weed and Euphorbia marginata are synonyms defined as:

ghost weed and Euphorbia marginata: annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk

Other synonyms of ghost weed include snow-in-summer, snow-on-the-mountain.

ghost weed (noun)	Euphorbia marginata (noun)
annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk	annual spurge of western United States having showy white-bracted flower clusters and very poisonous milk