blurt

As verbs the difference between shriek and blurt

is that shriek is to utter a loud, sharp, shrill sound or cry, as do some birds and beasts; to scream, as in a sudden fright, in horror or anguish while blurt is to utter suddenly and unadvisedly; to speak quickly or without thought; to divulge inconsiderately — commonly with out.

As a noun shriek

is a sharp, shrill outcry or scream; a shrill wild cry such as is caused by sudden or extreme terror, pain, or the like.

As a noun blort

is a snort of liquid from the mouth out through the nose; as in response to something unexpected and/or funny.

As a verb blurt is

to utter suddenly and unadvisedly; to speak quickly or without thought; to divulge inconsiderately — commonly with out.