cowfish vs trunkfish

cowfish and trunkfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
cowfish	Yes	No	No	No
trunkfish	Yes	No	No	No

As nouns, trunkfish is a hypernym of cowfish; that is, trunkfish is a word with a broader meaning than cowfish:

cowfish: trunkfish having hornlike spines over the eyes
trunkfish: any of numerous small tropical fishes having body and head encased in bony plates

Other hypernyms of cowfish include boxfish.

cowfish (noun)	trunkfish (noun)
trunkfish having hornlike spines over the eyes	any of numerous small tropical fishes having body and head encased in bony plates