paper nautilus vs Argonauta argo

paper nautilus and Argonauta argo both are nouns.

Word	Noun	Adjective	Verb	Adverb
paper nautilus	Yes	No	No	No
Argonauta argo	Yes	No	No	No

As nouns, paper nautilus and Argonauta argo are synonyms defined as:

paper nautilus and Argonauta argo: cephalopod mollusk of warm seas whose females have delicate papery spiral shells

Other synonyms of paper nautilus include Argonaut, nautilus.

paper nautilus (noun)	Argonauta argo (noun)
cephalopod mollusk of warm seas whose females have delicate papery spiral shells	cephalopod mollusk of warm seas whose females have delicate papery spiral shells