gospel truth vs truth

gospel truth and truth both are nouns.

Word	Noun	Adjective	Verb	Adverb
gospel truth	Yes	No	No	No
truth	Yes	No	No	No

As nouns, truth is a hypernym of gospel truth; that is, truth is a word with a broader meaning than gospel truth:

Other hypernyms of gospel truth include true statement.

gospel truth (noun)	truth (noun)
an unquestionable truth	the quality of being near to the true value
	a fact that has been verified
	a true statement
	conformity to reality or actuality