divulge vs sing

divulge and sing both are verbs.

Word	Noun	Adjective	Verb	Adverb
divulge	No	No	Yes	No
sing	No	No	Yes	No

As verbs, sing is a hyponym of divulge; that is, sing is a word with a more specific, narrower meaning than divulge:

divulge: make known to the public information that was previously known only to a few people or that was meant to be kept a secret
sing: divulge confidential information or secrets

divulge (verb)	sing (verb)
make known to the public information that was previously known only to a few people or that was meant to be kept a secret	make a whining, ringing, or whistling sound
	divulge confidential information or secrets
	to make melodious sounds
	produce tones with the voice
	deliver by singing