horse nettle vs ball nightshade

horse nettle and ball nightshade both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse nettle	Yes	No	No	No
ball nightshade	Yes	No	No	No

As nouns, horse nettle and ball nightshade are synonyms defined as:

horse nettle and ball nightshade: coarse prickly weed having pale yellow flowers and yellow berrylike fruit; common throughout southern and eastern United States

Other synonyms of horse nettle include ball nettle, bull nettle, Solanum carolinense.

horse nettle (noun)	ball nightshade (noun)
coarse prickly weed having pale yellow flowers and yellow berrylike fruit; common throughout southern and eastern United States	coarse prickly weed having pale yellow flowers and yellow berrylike fruit; common throughout southern and eastern United States