mountain oak vs alpine ash

mountain oak and alpine ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain oak	Yes	No	No	No
alpine ash	Yes	No	No	No

As nouns, mountain oak and alpine ash are synonyms defined as:

mountain oak and alpine ash: tall timber tree with hard heavy pinkish or light brown wood

Other synonyms of mountain oak include Eucalyptus delegatensis.

mountain oak (noun)	alpine ash (noun)
tall timber tree with hard heavy pinkish or light brown wood	tall timber tree with hard heavy pinkish or light brown wood