crazy weed vs crazyweed

crazy weed and crazyweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
crazy weed	Yes	No	No	No
crazyweed	Yes	No	No	No

As nouns, crazy weed and crazyweed are synonyms defined as:

crazy weed and crazyweed: any of several leguminous plants of western North America causing locoism in livestock

Other synonyms of crazy weed include locoweed.

crazy weed (noun)	crazyweed (noun)
any of several leguminous plants of western North America causing locoism in livestock	any of several leguminous plants of western North America causing locoism in livestock