sing vs let the cat out of the bag

sing and let the cat out of the bag both are verbs.

Word	Noun	Adjective	Verb	Adverb
sing	No	No	Yes	No
let the cat out of the bag	No	No	Yes	No

As verbs, sing and let the cat out of the bag are synonyms defined as:

sing and let the cat out of the bag: divulge confidential information or secrets

Other synonyms of sing include babble, babble out, blab, blab out, peach, spill the beans, talk, tattle.

sing (verb)	let the cat out of the bag (verb)
make a whining, ringing, or whistling sound	divulge confidential information or secrets
divulge confidential information or secrets
to make melodious sounds
produce tones with the voice
deliver by singing