cryptic vs sibylline

cryptic and sibylline both are adjectives.

Word	Noun	Adjective	Verb	Adverb
cryptic	No	Yes	No	No
sibylline	No	Yes	No	No

As adjectives, cryptic and sibylline are synonyms defined as:

Other synonyms of cryptic include cabalistic, cryptical, kabbalistic, qabalistic.

cryptic (adjective)	sibylline (adjective)
having a puzzling terseness	having a secret or hidden meaning
having a secret or hidden meaning	resembling or characteristic of a prophet or prophecy
of an obscure nature