leatherleaf vs polypody

leatherleaf and polypody both are nouns.

Word	Noun	Adjective	Verb	Adverb
leatherleaf	Yes	No	No	No
polypody	Yes	No	No	No

As nouns, polypody is a hypernym of leatherleaf; that is, polypody is a word with a broader meaning than leatherleaf:

leatherleaf: stiff leathery-leaved fern of western North America having ovate fronds parted to the midrib
polypody: any of numerous ferns of the genus Polypodium

leatherleaf (noun)	polypody (noun)
north temperate bog shrub with evergreen leathery leaves and small white cylindrical flowers	any of numerous ferns of the genus Polypodium
stiff leathery-leaved fern of western North America having ovate fronds parted to the midrib