bull nettle vs horse nettle

bull nettle and horse nettle both are nouns.

Word	Noun	Adjective	Verb	Adverb
bull nettle	Yes	No	No	No
horse nettle	Yes	No	No	No

As nouns, bull nettle and horse nettle are synonyms defined as:

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

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

bull nettle (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