ghost gum vs white ash

ghost gum and white ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
ghost gum	Yes	No	No	No
white ash	Yes	No	No	No

As nouns, ghost gum and white ash are synonyms defined as:

ghost gum and white ash: small to medium-sized tree of Australia and Tasmania having smooth white to light-grey bark shedding in patches or strips

Other synonyms of ghost gum include Eucalyptus coriacea, Eucalyptus pauciflora, snow gum.

ghost gum (noun)	white ash (noun)
small to medium-sized tree of Australia and Tasmania having smooth white to light-grey bark shedding in patches or strips	spreading American ash with leaves pale green or silvery beneath and having hard brownish wood
	small to medium-sized tree of Australia and Tasmania having smooth white to light-grey bark shedding in patches or strips