false bracken vs fern

false bracken and fern both are nouns.

Word	Noun	Adjective	Verb	Adverb
false bracken	Yes	No	No	No
fern	Yes	No	No	No

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

false bracken: resembles Pteridium aquilinum; of Queensland, Australia
fern: any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores

false bracken (noun)	fern (noun)
resembles Pteridium aquilinum; of Queensland, Australia	any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores