paper nautilus vs octopod

paper nautilus and octopod both are nouns.

Word	Noun	Adjective	Verb	Adverb
paper nautilus	Yes	No	No	No
octopod	Yes	No	No	No

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

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

paper nautilus (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