maidenhair vs maidenhair fern

maidenhair and maidenhair fern both are nouns.

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

As nouns, maidenhair and maidenhair fern are synonyms defined as:

maidenhair and maidenhair fern: any of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds

maidenhair (noun)	maidenhair fern (noun)
any of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds	any of various small to large terrestrial ferns of the genus Adiantum having delicate palmately branched fronds