spider brake vs fern

spider brake and fern both are nouns.

Word	Noun	Adjective	Verb	Adverb
spider brake	Yes	No	No	No
fern	Yes	No	No	No

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

spider brake: Asiatic fern introduced in America
fern: any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores

spider brake (noun)	fern (noun)
Asiatic fern introduced in America	any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores