Pythoness vs Pythia

Pythoness and Pythia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pythoness	Yes	No	No	No
Pythia	Yes	No	No	No

As nouns, Pythoness and Pythia are synonyms defined as:

Pythoness and Pythia: (Greek mythology) the priestess of Apollo at Delphi who transmitted the oracles

Pythoness (noun)	Pythia (noun)
(Greek mythology) the priestess of Apollo at Delphi who transmitted the oracles	(Greek mythology) the priestess of Apollo at Delphi who transmitted the oracles