European mountain ash vs rowan tree

European mountain ash and rowan tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
European mountain ash	Yes	No	No	No
rowan tree	Yes	No	No	No

As nouns, European mountain ash and rowan tree are synonyms defined as:

European mountain ash and rowan tree: Eurasian tree with orange-red berrylike fruits

Other synonyms of European mountain ash include rowan, Sorbus aucuparia.

European mountain ash (noun)	rowan tree (noun)
Eurasian tree with orange-red berrylike fruits	Eurasian tree with orange-red berrylike fruits