Rhus ovata vs sumach

Rhus ovata and sumach both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rhus ovata	Yes	No	No	No
sumach	Yes	No	No	No

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

Rhus ovata: evergreen shrub of southeastern United States with spikes of reddish yellow flowers and glandular hairy fruits
sumach: a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)

Other hypernyms of Rhus ovata include shumac, sumac.

Rhus ovata (noun)	sumach (noun)
evergreen shrub of southeastern United States with spikes of reddish yellow flowers and glandular hairy fruits	a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)