The difference between Clock and Whack

When used as nouns, clock means an instrument used to measure or keep track of time, whereas whack means the sound of a heavy strike.

When used as verbs, clock means to measure the duration of, whereas whack means to hit, slap or strike.

check bellow for the other definitions of Clock and Whack

Clock as a noun:

An instrument used to measure or keep track of time; a non-portable timepiece.
Clock as a noun (British):

The odometer of a motor vehicle.

Examples:

"This car has over 300,000 miles on the clock."
Clock as a noun (electronics):

An electrical signal that synchronizes timing among digital circuits of semiconductor chips or modules.
Clock as a noun:

The seed head of a dandelion.
Clock as a noun:

A time clock.

Examples:

"I can't go off to lunch yet: I'm still on the clock."

"We let the guys use the shop's tools and equipment for their own projects as long as they're off the clock."
Clock as a noun (computing, informal):

A CPU clock cycle, or T-state.

Clock as a verb (transitive):

To measure the duration of.
Clock as a verb (transitive):

To measure the speed of.

Examples:

"He was clocked at 155 miles per hour."
Clock as a verb (transitive, slang):

To hit (someone) heavily.

Examples:

"When the boxer let down his guard, his opponent clocked him."
Clock as a verb (slang):

To take notice of; to realise; to recognize someone or something

Examples:

"'Clock the wheels on that car!"

"He finally clocked that there were no more cornflakes."

"A trans person may be able to easily clock other trans people."
Clock as a verb (British, slang):

To falsify the reading of the odometer of a vehicle.

Examples:

"I don't believe that car has done only 40,000 miles. It's been clocked.'"
Clock as a verb (transitive, New Zealand, slang):

To beat a video game.

Examples:

"Have you clocked that game yet?"

Clock as a noun:

A pattern near the heel of a sock or stocking.

Examples:

"rfquotek Jonathan Swift"

Clock as a verb (transitive):

To ornament (e.g. the side of a stocking) with figured work.

Clock as a noun:

A large beetle, especially the European dung beetle ().

Clock as a verb (Scotland, intransitive, dated):

To make the sound of a hen; to cluck.
Clock as a verb (Scotland, intransitive, dated):

To hatch.

Whack as a noun:

The sound of a heavy strike.
Whack as a noun:

The strike itself.
Whack as a noun:

The stroke itself, regardless of its successful impact.
Whack as a noun:

An attempt, a chance, a turn, a go, originally an attempt to beat someone or something.

Examples:

"C'mon. Take a whack at it."

"40 bucks a whack."
Whack as a noun:

A share, a portion, especially a full share or large portion.
Whack as a noun:

A whack-up: a division of an amount into separate whacks, a divvying up.
Whack as a noun:

A deal, an agreement.

Examples:

"It's a whack!"
Whack as a noun:

The backslash,

Examples:

"del c:\docs\readme.txt"

Whack as a verb:

To hit, slap or strike.
Whack as a verb (slang):

To kill, bump off.
Whack as a verb (transitive, slang):

To share or parcel out; often with up.

Examples:

"to whack the spoils of a robbery"
Whack as a verb (sports):

To beat convincingly; to thrash.
Whack as a verb (UK, usually in the negative):

To surpass; to better.