scolopendrium vs fern

scolopendrium and fern both are nouns.

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

As nouns, fern is a hypernym of scolopendrium; that is, fern is a word with a broader meaning than scolopendrium:

scolopendrium: a fern thought to resemble a millipede
fern: any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores

scolopendrium (noun)	fern (noun)
a fern thought to resemble a millipede	any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores