southern maidenhair vs Venus'-hair fern

southern maidenhair and Venus'-hair fern both are nouns.

Word	Noun	Adjective	Verb	Adverb
southern maidenhair	Yes	No	No	No
Venus'-hair fern	Yes	No	No	No

As nouns, southern maidenhair and Venus'-hair fern are synonyms defined as:

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

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

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