squaw-bush vs shumac

squaw-bush and shumac both are nouns.

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

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

squaw-bush: deciduous shrub of California with unpleasantly scented usually trifoliate leaves and edible fruit
shumac: a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)

Other hypernyms of squaw-bush include sumac, sumach.

squaw-bush (noun)	shumac (noun)
deciduous shrub of California with unpleasantly scented usually trifoliate leaves and edible fruit	a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)