believability vs credibility

believability and credibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
believability	Yes	No	No	No
credibility	Yes	No	No	No

As nouns, believability and credibility are synonyms defined as:

believability and credibility: the quality of being believable or trustworthy

Other synonyms of believability include credibleness.

believability (noun)	credibility (noun)
the quality of being believable or trustworthy	the quality of being believable or trustworthy