poison sumac vs Rhus vernix

poison sumac and Rhus vernix both are nouns.

Word	Noun	Adjective	Verb	Adverb
poison sumac	Yes	No	No	No
Rhus vernix	Yes	No	No	No

As nouns, poison sumac and Rhus vernix are synonyms defined as:

poison sumac and Rhus vernix: smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil

Other synonyms of poison sumac include poison ash, poison dogwood, Toxicodendron vernix.

poison sumac (noun)	Rhus vernix (noun)
smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil	smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil
dermatitis resulting from contact with a poison sumac plant