Difference between Blunder and Screw Up

BLUNDER vs SCREW UP: NOUN

Confusion; disturbance.
A clumsy or embarrassing mistake.
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
A gross error or mistake, resulting from carelessness, stupidity, or culpable ignorance.

To make a mistake.
To move clumsily or haltingly.
To make a mistake in; botch.
To utter (something) stupidly or thoughtlessly.
To make a gross error or mistake.
To move in an awkward, clumsy manner; to flounder and stumble.
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 mix (things) confusedly; confuse.
To confound; confuse; distract; cause to make blunders: as, “to blunder an adversary,”
To injure or destroy by blundering; mismanage: as, “to darken or blunder the cause,”
To do or make faultily or erroneously; make mistakes in through ignorance or stupidity; bungle.
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

Bobble, Fluff, Flub, Mishandle, Spoil, Blow, Muff, Fumble, Botch, Blunder, Bollocks, Bollix, Bungle, Heat up, Mess up

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

Foul up, Botch up, Bobble, Fluff, Flub, Mishandle, Spoil, Blow, Fumble, Botch, Blunder, Bollocks, Bollix, Bungle, Mess up

Difficult to screw up a cup of coffee.
The reports are too easy to screw up!
BUT they managed to screw up the Kessy.
And no lunatic licensing scheme to screw up.
Funny Memes That Screw Up The American Dream.
I screwed up and I am thankful that I didn't screw up more.
It was like I had screwed up in every possible way that a human being could screw up.
Why the parade of public figures unable to own up when they screw up?
Typical CIA screw up and cover up by Richard Helms.
FOREVER, screw up connections and then do everything they can to screw you out of health care.