sugar-bush vs shumac

sugar-bush and shumac both are nouns.

Word	Noun	Adjective	Verb	Adverb
sugar-bush	Yes	No	No	No
shumac	Yes	No	No	No

As nouns, shumac is a hypernym of sugar-bush; that is, shumac is a word with a broader meaning than sugar-bush:

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

Other hypernyms of sugar-bush include sumac, sumach.

sugar-bush (noun)	shumac (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)