doodia vs fern

doodia and fern both are nouns.

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

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

doodia: any fern of the genus Doodia having pinnate fronds with sharply dentate pinnae
fern: any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores

doodia (noun)	fern (noun)
any fern of the genus Doodia having pinnate fronds with sharply dentate pinnae	any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores