Sorbus aucuparia vs European mountain ash

Sorbus aucuparia and European mountain ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sorbus aucuparia	Yes	No	No	No
European mountain ash	Yes	No	No	No

As nouns, Sorbus aucuparia and European mountain ash are synonyms defined as:

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

Other synonyms of Sorbus aucuparia include rowan, rowan tree.

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