red gum vs sweet gum

red gum and sweet gum both are nouns.

Word	Noun	Adjective	Verb	Adverb
red gum	Yes	No	No	No
sweet gum	Yes	No	No	No

As nouns, red gum and sweet gum are synonyms defined as:

red gum and sweet gum: a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap

Other synonyms of red gum include American sweet gum, bilsted, Liquidambar styraciflua, sweet gum tree.

As nouns, red gum and sweet gum are synonyms defined as:

red gum and sweet gum: reddish-brown wood and lumber from heartwood of the sweet gum tree used to make furniture

Other synonyms of red gum include hazelwood, satin walnut.

red gum (noun)	sweet gum (noun)
red gum tree of Tasmania	a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap
very large red gum tree	aromatic exudate from the sweet gum tree
a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap	reddish-brown wood and lumber from heartwood of the sweet gum tree used to make furniture
reddish-brown wood and lumber from heartwood of the sweet gum tree used to make furniture
reddish-brown dried gummy exudation from any of several trees of the genus Eucalyptus especially Eucalyptus camaldulensis