scarlet maple vs Acer rubrum

scarlet maple and Acer rubrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
scarlet maple	Yes	No	No	No
Acer rubrum	Yes	No	No	No

As nouns, scarlet maple and Acer rubrum are synonyms defined as:

scarlet maple and Acer rubrum: maple of eastern and central America; five-lobed leaves turn scarlet and yellow in autumn

Other synonyms of scarlet maple include red maple, swamp maple.

scarlet maple (noun)	Acer rubrum (noun)
maple of eastern and central America; five-lobed leaves turn scarlet and yellow in autumn	maple of eastern and central America; five-lobed leaves turn scarlet and yellow in autumn