black ash vs hoop ash

black ash and hoop ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
black ash	Yes	No	No	No
hoop ash	Yes	No	No	No

As nouns, black ash and hoop ash are synonyms defined as:

black ash and hoop ash: vigorous spreading North American tree having dark brown heavy wood; leaves turn gold in autumn

Other synonyms of black ash include basket ash, brown ash, Fraxinus nigra.

black ash (noun)	hoop ash (noun)
vigorous spreading North American tree having dark brown heavy wood; leaves turn gold in autumn	vigorous spreading North American tree having dark brown heavy wood; leaves turn gold in autumn