common maidenhair vs Venus maidenhair

common maidenhair and Venus maidenhair both are nouns.

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

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

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

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

common 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