poison ash vs Rhus vernix

poison ash and Rhus vernix both are nouns.

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

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

poison ash 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 ash include poison dogwood, poison sumac, Toxicodendron vernix.

poison ash (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