ball nightshade vs horse nettle

ball nightshade and horse nettle both are nouns.

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

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

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

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

ball nightshade (noun)	horse nettle (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