crazyweed vs leguminous plant

crazyweed and leguminous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
crazyweed	Yes	No	No	No
leguminous plant	Yes	No	No	No

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

crazyweed: any of several leguminous plants of western North America causing locoism in livestock
leguminous plant: an erect or climbing bean or pea plant of the family Leguminosae

Other hypernyms of crazyweed include legume.

crazyweed (noun)	leguminous plant (noun)
any of several leguminous plants of western North America causing locoism in livestock	an erect or climbing bean or pea plant of the family Leguminosae