evergreen magnolia vs southern magnolia

evergreen magnolia and southern magnolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
evergreen magnolia	Yes	No	No	No
southern magnolia	Yes	No	No	No

As nouns, evergreen magnolia and southern magnolia are synonyms defined as:

evergreen magnolia and southern magnolia: evergreen tree of southern United States having large stiff glossy leaves and huge white sweet-smelling flowers

Other synonyms of evergreen magnolia include bull bay, large-flowering magnolia, Magnolia grandiflora.

evergreen magnolia (noun)	southern magnolia (noun)
evergreen tree of southern United States having large stiff glossy leaves and huge white sweet-smelling flowers	evergreen tree of southern United States having large stiff glossy leaves and huge white sweet-smelling flowers