singing vs revelation

singing and revelation both are nouns.

Word	Noun	Adjective	Verb	Adverb
singing	Yes	Yes	No	No
revelation	Yes	No	No	No

As nouns, revelation is a hypernym of singing; that is, revelation is a word with a broader meaning than singing:

Other hypernyms of singing include disclosure, revealing.

singing (noun)	revelation (noun)
the act of singing vocal music	an enlightening or astonishing disclosure
disclosing information or giving evidence about another	communication of knowledge to man by a divine or supernatural agency
	the speech act of making something evident

singing (adjective)	revelation (adjective)
smooth and flowing