back

As nouns the difference between back and brack

is that back is a small stream or brook while brack is (obsolete) salt or brackish water or brack can be an opening caused by the parting of a solid body; a crack or breach.

As a noun back

is a small stream or brook.

As a verb nack is

(computing) to acknowledge negatively; to send a nak signal to.

As nouns the difference between back and zack

is that back is the rear of the body, especially the part between the neck and the end of the spine and opposite the chest and belly while zack is sixpence.

As an adjective back

is near the rear.

As an adverb back

is to or in a previous condition or place.

As a verb back

is to go in the reverse direction.

As a proper noun Zack is

a male given name, diminutive of Zachariah and Zachary.

As nouns the difference between back and ack

is that back is a small stream or brook while ack is the letter a as used in signalling and other types of communications.

As an interjection ack is

(radio communications) acknowledged or ack can be expressing distaste, alarm, or trepidation.

As nouns the difference between back and fack

is that back is a small stream or brook while fack is one of the four stomachs of a ruminating animal; rumen; paunch.

As a noun back

is a small stream or brook.

As a proper noun bacs is

.

As nouns the difference between back and mack

is that back is the rear of the body, especially the part between the neck and the end of the spine and opposite the chest and belly while mack is an individual skilled in the art of seduction using verbal skills.

As verbs the difference between back and mack

is that back is to go in the reverse direction while mack is to act as pimp; to pander.

As an adjective back

is near the rear.

As an adverb back

is to or in a previous condition or place.

As a proper noun Mack is

a man; used to address a man whose name is unknown.

As nouns the difference between back and yack

is that back is a small stream or brook while yack is chatter.

As a verb yack is

(slang) to vomit, usually because of intoxication.

As a noun back

is a small stream or brook.

As an interjection gack is

(often|repeated several times) the sound of a cat coughing up a hairball.

As a verb gack is

to make a 'gack' noise.

As a noun back

is a small stream or brook.

As a verb bask is

to bathe in warmth; to be exposed to pleasant heat.