lemon-scented gum vs Eucalyptus citriodora

lemon-scented gum and Eucalyptus citriodora both are nouns.

Word	Noun	Adjective	Verb	Adverb
lemon-scented gum	Yes	No	No	No
Eucalyptus citriodora	Yes	No	No	No

As nouns, lemon-scented gum and Eucalyptus citriodora are synonyms defined as:

lemon-scented gum and Eucalyptus citriodora: similar to but smaller than the spotted gum and having lemon-scented leaves

Other synonyms of lemon-scented gum include Eucalyptus maculata citriodora.

lemon-scented gum (noun)	Eucalyptus citriodora (noun)
similar to but smaller than the spotted gum and having lemon-scented leaves	similar to but smaller than the spotted gum and having lemon-scented leaves