Argonauta argo vs octopod

Argonauta argo and octopod both are nouns.

Word	Noun	Adjective	Verb	Adverb
Argonauta argo	Yes	No	No	No
octopod	Yes	No	No	No

As nouns, octopod is a hypernym of Argonauta argo; that is, octopod is a word with a broader meaning than Argonauta argo:

Argonauta argo: cephalopod mollusk of warm seas whose females have delicate papery spiral shells
octopod: a cephalopod with eight arms but lacking an internal shell

Argonauta argo (noun)	octopod (noun)
cephalopod mollusk of warm seas whose females have delicate papery spiral shells	a cephalopod with eight arms but lacking an internal shell