jimson weed vs jimsonweed

jimson weed and jimsonweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
jimson weed	Yes	No	No	No
jimsonweed	Yes	No	No	No

As nouns, jimson weed and jimsonweed are synonyms defined as:

jimson weed and jimsonweed: intensely poisonous tall coarse annual tropical weed having rank-smelling foliage, large white or violet trumpet-shaped flowers and prickly fruits

Other synonyms of jimson weed include apple of Peru, common thorn apple, Datura stramonium, Jamestown weed.

jimson weed (noun)	jimsonweed (noun)
intensely poisonous tall coarse annual tropical weed having rank-smelling foliage, large white or violet trumpet-shaped flowers and prickly fruits	intensely poisonous tall coarse annual tropical weed having rank-smelling foliage, large white or violet trumpet-shaped flowers and prickly fruits