Thelypteris dryopteris vs oak fern

Thelypteris dryopteris and oak fern both are nouns.

Word	Noun	Adjective	Verb	Adverb
Thelypteris dryopteris	Yes	No	No	No
oak fern	Yes	No	No	No

As nouns, Thelypteris dryopteris and oak fern are synonyms defined as:

Thelypteris dryopteris and oak fern: bright blue-green fern widely distributed especially in damp acid woodlands of temperate Northern Hemisphere

Other synonyms of Thelypteris dryopteris include Gymnocarpium dryopteris.

Thelypteris dryopteris (noun)	oak fern (noun)
bright blue-green fern widely distributed especially in damp acid woodlands of temperate Northern Hemisphere	bright blue-green fern widely distributed especially in damp acid woodlands of temperate Northern Hemisphere