Eucalyptus rostrata vs river gum

Eucalyptus rostrata and river gum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eucalyptus rostrata	Yes	No	No	No
river gum	Yes	No	No	No

As nouns, Eucalyptus rostrata and river gum are synonyms defined as:

Eucalyptus rostrata and river gum: somewhat crooked red gum tree growing chiefly along rivers; has durable reddish lumber used in heavy construction

Other synonyms of Eucalyptus rostrata include Eucalyptus camaldulensis, river red gum.

Eucalyptus rostrata (noun)	river gum (noun)
somewhat crooked red gum tree growing chiefly along rivers; has durable reddish lumber used in heavy construction	somewhat crooked red gum tree growing chiefly along rivers; has durable reddish lumber used in heavy construction