dwarf sumac vs sumach

dwarf sumac and sumach both are nouns.

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

As nouns, sumach is a hypernym of dwarf sumac; that is, sumach is a word with a broader meaning than dwarf sumac:

dwarf sumac: common nonpoisonous shrub of eastern North America with compound leaves and green paniculate flowers followed by red berries
sumach: a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)

Other hypernyms of dwarf sumac include shumac, sumac.

dwarf sumac (noun)	sumach (noun)
common nonpoisonous shrub of eastern North America with compound leaves and green paniculate flowers followed by red berries	a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)