Difference between Blunder and Blooper

BLUNDER vs BLOOPER: NOUN

Synonyms Error, Mistake, Blunder, Bull. An error is a wandering from truth, primarily in impression, judgment, or calculation, and, by extension of the idea, in conduct; it may be a state. A mistake is a false judgment or choice; it does not, as error sometimes does, imply moral obliquity, the defect being placed wholly in the wisdom of the actor, and in its treatment of this defect the word is altogether gentle. Blunder is a strong word for a mistake which is stupid, a gross error in action or speech. A bull is a blunder in language, involving generally a very obvious and comical contradiction; but the word is sometimes applied to any particularly inapt or ludicrously inappropriate remark.
A mistake made through precipitance or mental confusion; a gross or stupid mistake.
A mistake typically caused by ignorance or carelessness.
An embarrassing mistake
Confusion; disturbance.
A gross error or mistake, resulting from carelessness, stupidity, or culpable ignorance.
A clumsy or embarrassing mistake.

A film or videotaped outtake that has recorded an amusing mistake and/or accident during the course of regular filming.
A fly ball that is weakly hit just over the infielders.
An error.
An embarrassing mistake
A clumsy mistake, especially one made in public; a faux pas.
A weakly hit ball that carries just beyond the infield.
A high pitch that is lobbed to the batter.

To utter (something) stupidly or thoughtlessly.
To make a mistake in; botch.
To move clumsily or haltingly.
To make a mistake.
To find or reach as if by an accident involving more or less stupidity, -- applied to something desirable; as, to blunder on a useful discovery.
To move in an awkward, clumsy manner; to flounder and stumble.
To make a gross error or mistake.

To do or make faultily or erroneously; make mistakes in through ignorance or stupidity; bungle.
To injure or destroy by blundering; mismanage: as, “to darken or blunder the cause,”
To confound; confuse; distract; cause to make blunders: as, “to blunder an adversary,”
To mix (things) confusedly; confuse.
To utter thoughtlessly or in a blundering manner; blurt out: generally with out: as, to blunder out an excuse.
To move or act blindly, stupidly, or without direction or steady guidance; flounder; stumble: frequently with on or along.
To make a gross mistake, especially through mental confusion; err widely or stupidly.

Screw up, Bollix, Misdoing, Mishandle, Blow, Bobble, Muff, Sin, Stumble, Fumble, Blooper, Goof, Botch, Flub, Bungle

Pratfall, Misstep, Bloop, Misplay, Miscue, Gaffe, Error, Foul up, Boo boo, Misdoing, Boner, Botch, Bungle, Flub, Blunder

Boob, Boner, Screw up, Bollix, Misdoing, Mishandle, Blow, Bobble, Sin, Fumble, Blooper, Goof, Botch, Flub, Bungle

Mistake, Pratfall, Misstep, Bloop, Misplay, Miscue, Gaffe, Error, Foul up, Misdoing, Boner, Botch, Bungle, Flub, Blunder