tongue fern vs felt fern

tongue fern and felt fern both are nouns.

Word	Noun	Adjective	Verb	Adverb
tongue fern	Yes	No	No	No
felt fern	Yes	No	No	No

As nouns, tongue fern and felt fern are synonyms defined as:

tongue fern and felt fern: east Asian fern having fronds shaped like tongues; sometimes placed in genus Cyclophorus

Other synonyms of tongue fern include Cyclophorus lingua, Pyrrosia lingua.

tongue fern (noun)	felt fern (noun)
east Asian fern having fronds shaped like tongues; sometimes placed in genus Cyclophorus	east Asian fern having fronds shaped like tongues; sometimes placed in genus Cyclophorus