squawbush vs shumac

squawbush and shumac both are nouns.

Word	Noun	Adjective	Verb	Adverb
squawbush	Yes	No	No	No
shumac	Yes	No	No	No

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

squawbush: 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 squawbush include sumac, sumach.

squawbush (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)