Venus'-hair fern vs southern maidenhair

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

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

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

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

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

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