southern maidenhair vs Venus maidenhair

southern maidenhair and Venus maidenhair both are nouns.

Word	Noun	Adjective	Verb	Adverb
southern maidenhair	Yes	No	No	No
Venus maidenhair	Yes	No	No	No

As nouns, southern maidenhair and Venus maidenhair are synonyms defined as:

southern maidenhair and Venus maidenhair: delicate maidenhair fern with slender shining black leaf stalks; cosmopolitan

Other synonyms of southern maidenhair include Adiantum capillus-veneris, common maidenhair, Venus'-hair fern, Venushair.

southern maidenhair (noun)	Venus maidenhair (noun)
delicate maidenhair fern with slender shining black leaf stalks; cosmopolitan	delicate maidenhair fern with slender shining black leaf stalks; cosmopolitan