poison ash vs Toxicodendron vernix

poison ash and Toxicodendron vernix both are nouns.

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

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

poison ash and Toxicodendron 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, Rhus vernix.

poison ash (noun)	Toxicodendron 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