fabulous vs mythological

fabulous and mythological both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fabulous	No	Yes	No	No
mythological	No	Yes	No	No

As adjectives, fabulous and mythological are synonyms defined as:

fabulous and mythological: based on or told of in traditional stories; lacking factual basis or historical validity

Other synonyms of fabulous include mythic, mythical, mythologic.

fabulous (adjective)	mythological (adjective)
barely credible	based on or told of in traditional stories; lacking factual basis or historical validity
extremely pleasing
based on or told of in traditional stories; lacking factual basis or historical validity