Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb blab

2 senses of blab

Sense 1
spill the beans, let the cat out of the bag, talk, tattle, blab, peach, babble, sing, babble out, blab out -- (divulge confidential information or secrets; "Be careful--his secretary talks")
       => unwrap, disclose, let on, bring out, reveal, discover, expose, divulge, break, give away, let out -- (make known to the public information that was previously known only to a few people or that was meant to be kept a secret; "The auction house would not disclose the price at which the van Gogh had sold"; "The actress won't reveal how old she is"; "bring out the truth"; "he broke the news to her"; "unwrap the evidence in the murder case")

Sense 2
chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, blabber, gabble -- (speak (about unimportant matters) rapidly and incessantly)
       => talk, speak, utter, mouth, verbalize, verbalise -- (express in speech; "She talks a lot of nonsense"; "This depressed patient does not verbalize")