hart's-tongue vs Polybotria cervina

hart's-tongue and Polybotria cervina both are nouns.

Word	Noun	Adjective	Verb	Adverb
hart's-tongue	Yes	No	No	No
Polybotria cervina	Yes	No	No	No

As nouns, hart's-tongue and Polybotria cervina are synonyms defined as:

hart's-tongue and Polybotria cervina: tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya

Other synonyms of hart's-tongue include hart's-tongue fern, Olfersia cervina, Polybotrya cervina.

hart's-tongue (noun)	Polybotria cervina (noun)
Eurasian fern with simple lanceolate fronds	tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya
tropical American terrestrial fern with leathery lanceolate fronds; sometimes placed in genus Polybotrya