spill the beans vs sing

spill the beans and sing both are verbs.

Word	Noun	Adjective	Verb	Adverb
spill the beans	No	No	Yes	No
sing	No	No	Yes	No

As verbs, spill the beans and sing are synonyms defined as:

Other synonyms of spill the beans include babble, babble out, blab, blab out, let the cat out of the bag, peach, talk, tattle.

spill the beans (verb)	sing (verb)
divulge confidential information or secrets	make a whining, ringing, or whistling sound
	divulge confidential information or secrets
	to make melodious sounds
	produce tones with the voice
	deliver by singing