nautilus vs Argonauta argo

nautilus and Argonauta argo both are nouns.

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

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

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

Other synonyms of nautilus include Argonaut, paper nautilus.

nautilus (noun)	Argonauta argo (noun)
cephalopod of the Indian and Pacific oceans having a spiral shell with pale pearly partitions	cephalopod mollusk of warm seas whose females have delicate papery spiral shells
cephalopod mollusk of warm seas whose females have delicate papery spiral shells
a submarine that is propelled by nuclear power