gossiper vs tattletale

gossiper and tattletale both are nouns.

Word	Noun	Adjective	Verb	Adverb
gossiper	Yes	No	No	No
tattletale	Yes	No	No	No

As nouns, tattletale is a hyponym of gossiper; that is, tattletale is a word with a more specific, narrower meaning than gossiper:

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

Other hyponyms of gossiper include cat, scandalmonger, blabbermouth, talebearer, taleteller, tattler, telltale, yenta.

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