spiny puffer vs plectognath

spiny puffer and plectognath both are nouns.

Word	Noun	Adjective	Verb	Adverb
spiny puffer	Yes	No	No	No
plectognath	Yes	No	No	No

As nouns, plectognath is a hypernym of spiny puffer; that is, plectognath is a word with a broader meaning than spiny puffer:

spiny puffer: puffers having rigid or erectile spines
plectognath: tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines

Other hypernyms of spiny puffer include plectognath fish.

spiny puffer (noun)	plectognath (noun)
puffers having rigid or erectile spines	tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines