red ash vs downy ash

red ash and downy ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
red ash	Yes	No	No	No
downy ash	Yes	No	No	No

As nouns, red ash and downy ash are synonyms defined as:

red ash and downy ash: smallish American tree with velvety branchlets and lower leaf surfaces

Other synonyms of red ash include Fraxinus pennsylvanica.

red ash (noun)	downy ash (noun)
smallish American tree with velvety branchlets and lower leaf surfaces	smallish American tree with velvety branchlets and lower leaf surfaces