Acer vs genus Acer

Acer and genus Acer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Acer	Yes	No	No	No
genus Acer	Yes	No	No	No

As nouns, Acer and genus Acer are synonyms defined as:

Acer and genus Acer: type genus of the Aceraceae; trees or shrubs having winged fruit

Acer (noun)	genus Acer (noun)
type genus of the Aceraceae; trees or shrubs having winged fruit	type genus of the Aceraceae; trees or shrubs having winged fruit