blab out vs talk

blab out is not a noun while talk is a noun.

Word	Noun	Adjective	Verb	Adverb
blab out	No	No	Yes	No
talk	Yes	No	Yes	No

As verbs, blab out and talk are synonyms defined as:

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

blab out (noun)	talk (noun)
	the act of giving a talk to an audience
	an exchange of ideas via conversation
	idle gossip or rumor
	a speech that is open to the public
	discussion; (`talk about' is a less formal alternative for `discussion of')

blab out (verb)	talk (verb)
divulge confidential information or secrets	express in speech
	exchange thoughts; talk with
	reveal information
	use language
	deliver a lecture or talk
	divulge confidential information or secrets