Nouns

(n)gospel, gospel truthan unquestionable truth“his word was gospel”
(n)gospel, gospel singingfolk music consisting of a genre of a cappella music originating with Black slaves in the United States and featuring call and response; influential on the development of other genres of popular music (especially soul)
(n)religious doctrine, church doctrine, gospel, creedthe written body of teachings of a religious group that are generally accepted by that group
(n)gospela doctrine that is believed to be of great importance“Newton's writings were gospel for those who followed”