sumach vs sumac

sumach and sumac both are nouns.

Word	Noun	Adjective	Verb	Adverb
sumach	Yes	No	No	No
sumac	Yes	No	No	No

As nouns, sumach and sumac are synonyms defined as:

sumach and sumac: a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)

Other synonyms of sumach include shumac.

sumach (noun)	sumac (noun)
a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)	a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)
	wood of a sumac