Venushair vs maidenhair fern

Venushair and maidenhair fern both are nouns.

Word	Noun	Adjective	Verb	Adverb
Venushair	Yes	No	No	No
maidenhair fern	Yes	No	No	No

As nouns, maidenhair fern is a hypernym of Venushair; that is, maidenhair fern is a word with a broader meaning than Venushair:

Venushair: delicate maidenhair fern with slender shining black leaf stalks; cosmopolitan
maidenhair fern: any of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds

Other hypernyms of Venushair include maidenhair.

Venushair (noun)	maidenhair fern (noun)
delicate maidenhair fern with slender shining black leaf stalks; cosmopolitan	any of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds