sing vs tattle

sing is not a noun while tattle is a noun.

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

As verbs, sing and tattle are synonyms defined as:

sing (noun)	tattle (noun)
	disclosing information or giving evidence about another

sing (verb)	tattle (verb)
make a whining, ringing, or whistling sound	speak (about unimportant matters) rapidly and incessantly
divulge confidential information or secrets	divulge confidential information or secrets
to make melodious sounds
produce tones with the voice
deliver by singing