purple loco vs crazyweed

purple loco and crazyweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
purple loco	Yes	No	No	No
crazyweed	Yes	No	No	No

As nouns, crazyweed is a hypernym of purple loco; that is, crazyweed is a word with a broader meaning than purple loco:

purple loco: tufted locoweed of southwestern United States having purple or pink to white flowers
crazyweed: any of several leguminous plants of western North America causing locoism in livestock

Other hypernyms of purple loco include crazy weed, locoweed.

purple loco (noun)	crazyweed (noun)
tufted locoweed of southwestern United States having purple or pink to white flowers	any of several leguminous plants of western North America causing locoism in livestock