alphabetical accuracy

Backcuracy: How good you are at operating a vehicle in reverse.
Hackcuracy: How often you "hit da nail on da head" in da sabotage department.
Jackcuracy: (1) How straight and level you get da lifting-device for changing your flat tire, or (2) how good you are at tossing/catching a small ball and spiky playing-pieces.
Knackcuracy: How well you know/perform a particular skill or ability.
Lackcuracy: How expert you are at NOT doing/possessing something.
Mackcuracy: How good a big-rig driver you are.

Additional examples of "alphabetical accuracy" include:
Packcuracy: How neatly/efficiently you load and/or store items.
Quackcuracy: (1) How well you imitate da vocalizations of a duck, or (2) how successfully you convince gullible bystanders of da legitimacy/efficacy of your snake-oil concoctions.
Rackcuracy: (1) How well you assess da status/quantity of merchandise on a display-frame, or (2) how correctly you predict/estimate da size, shape, appearance, warmth/softness, etc. of a gal's boobs.
Sackcuracy: (1) How well you estimate da contents of a bag, or (2) how closely your guess when someone is gonna be given da boot from his present employment.
Stackcuracy: How good you are at piling up items without their falling over again.
Tackcuracy: (1) How closely you estimate da stickiness of a particular adhesive, or (2) how correct you are regarding how well a pushpin holds up an object.
Trackcuracy: (1) How good you are at maintaining good records, or (2) how efficient you are at staying on da rails when shunting freight-cars.
Whackcuracy: How often your palm "lands on target" when swatting someone's butt on his way past you.
Yackcuracy: How valid da content of an extended monologue is.