western redbud vs California redbud

western redbud and California redbud both are nouns.

Word	Noun	Adjective	Verb	Adverb
western redbud	Yes	No	No	No
California redbud	Yes	No	No	No

As nouns, western redbud and California redbud are synonyms defined as:

western redbud and California redbud: shrub of western United States having pink or crimson flowers; often forms thickets

Other synonyms of western redbud include Cercis occidentalis.

western redbud (noun)	California redbud (noun)
shrub of western United States having pink or crimson flowers; often forms thickets	shrub of western United States having pink or crimson flowers; often forms thickets