Argonaut vs fictitious character

Argonaut and fictitious character both are nouns.

Word	Noun	Adjective	Verb	Adverb
Argonaut	Yes	No	No	No
fictitious character	Yes	No	No	No

Argonaut (noun)	fictitious character (noun)
cephalopod mollusk of warm seas whose females have delicate papery spiral shells	an imaginary person represented in a work of fiction (play or film or story)
(Greek mythology) one of the heroes who sailed with Jason in search of the Golden Fleece