prophesier vs sibyl

prophesier and sibyl both are nouns.

Word	Noun	Adjective	Verb	Adverb
prophesier	Yes	No	No	No
sibyl	Yes	No	No	No

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

Other hyponyms of prophesier include augur, auspex, prophetess.

prophesier (noun)	sibyl (noun)
an authoritative person who divines the future	(ancient Rome) a woman who was regarded as an oracle or prophet
	a woman who tells fortunes