vortex vs Charybdis

vortex and Charybdis both are nouns.

Word	Noun	Adjective	Verb	Adverb
vortex	Yes	No	No	No
Charybdis	Yes	No	No	No

As nouns, Charybdis is a hyponym of vortex; that is, Charybdis is a word with a more specific, narrower meaning than vortex:

vortex: a powerful circular current of water (usually the result of conflicting tides)
Charybdis: (Greek mythology) a ship-devouring whirlpool lying on the other side of a narrow strait from Scylla

vortex (noun)	Charybdis (noun)
a powerful circular current of water (usually the result of conflicting tides)	(Greek mythology) a ship-devouring whirlpool lying on the other side of a narrow strait from Scylla
the shape of something rotating rapidly