telltale vs newsmonger

telltale and newsmonger both are nouns.

Word	Noun	Adjective	Verb	Adverb
telltale	Yes	Yes	No	No
newsmonger	Yes	No	No	No

As nouns, newsmonger is a hypernym of telltale; that is, newsmonger is a word with a broader meaning than telltale:

telltale: someone who gossips indiscreetly
newsmonger: a person given to gossiping and divulging personal information about others

Other hypernyms of telltale include gossip, gossiper, gossipmonger, rumormonger, rumourmonger.

telltale (noun)	newsmonger (noun)
someone who gossips indiscreetly	a person given to gossiping and divulging personal information about others

telltale (adjective)	newsmonger (adjective)
disclosing unintentionally something concealed