coralbells vs alumbloom

coralbells and alumbloom both are nouns.

Word	Noun	Adjective	Verb	Adverb
coralbells	Yes	No	No	No
alumbloom	Yes	No	No	No

As nouns, alumbloom is a hypernym of coralbells; that is, alumbloom is a word with a broader meaning than coralbells:

coralbells: perennial plant of the western United States having bright red flowers in feathery spikes; used as an ornamental
alumbloom: any of several herbs of the genus Heuchera

Other hypernyms of coralbells include alumroot.

coralbells (noun)	alumbloom (noun)
perennial plant of the western United States having bright red flowers in feathery spikes; used as an ornamental	any of several herbs of the genus Heuchera