American sweet gum vs sweet gum tree

American sweet gum and sweet gum tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
American sweet gum	Yes	No	No	No
sweet gum tree	Yes	No	No	No

As nouns, American sweet gum and sweet gum tree are synonyms defined as:

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

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

American sweet gum (noun)	sweet gum tree (noun)
a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap	a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap