earthtongue vs fungus

earthtongue and fungus both are nouns.

Word	Noun	Adjective	Verb	Adverb
earthtongue	Yes	No	No	No
fungus	Yes	No	No	No

As nouns, fungus is a hypernym of earthtongue; that is, fungus is a word with a broader meaning than earthtongue:

earthtongue: any club-shaped fungus of the genus Geoglossum
fungus: an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia

earthtongue (noun)	fungus (noun)
any club-shaped fungus of the genus Geoglossum	an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia