The difference between Boo-boo and Scratch

Boo-boo as a noun (countable, colloquial, often, childish):

A mistake or error.

Boo-boo as a noun (countable, colloquial, childish, by or to young children):

A minor injury, such as a cut or a bruise.

Boo-boo as a noun (uncountable, colloquial, childish, by or to young children):

Feces.

Boo-boo as a verb (colloquial, childish, by or to young children):

To defecate.

Scratch as a verb:

To rub a surface with a sharp object, especially by a living creature to remove itching with nails, claws, etc.

Scratch as a verb:

To rub the skin with rough material causing a sensation of irritation. For a man, when kissing someone, to irritate the skin of that person with one's unshaven beard.

Scratch as a verb:

To mark a surface with a sharp object, thereby leaving a scratch (noun).

Scratch as a verb:

To cross out, strike out, strike through some text on a page. Hence, to remove, ignore or delete.

Scratch as a verb (music):

To produce a distinctive sound on a turntable by moving a vinyl record back and forth while manipulating the crossfader (see also scratching).

Scratch as a verb (billiards):

To commit a foul in pool, as where the cue ball is put into a pocket or jumps off the table.

Scratch as a verb (billiards, dated, US):

To score, not by skillful play but by some fortunate chance of the game.

Scratch as a verb:

To write or draw hastily or awkwardly.

Scratch as a verb:

To dig or excavate with the claws.

Scratch as a verb:

To dig or scrape (a person's skin) with claws or fingernails in self-defense or with the intention to injure.

Scratch as a noun (countable):

A disruption, mark or shallow cut on a surface made by scratching.

Scratch as a noun:

An act of scratching the skin to alleviate an itch or irritation.

Scratch as a noun (sports):

A starting line (originally and simply, a line scratched in the ground), as in boxing. A technical error of touching or surpassing the starting mark prior to the official start signal in the sporting events of long jump, discus, hammer throw, shot put, and similar. Originally the starting mark was a scratch on the ground but is now a board or precisely indicated mark. The last riders to depart in a handicap race. An aberration. # A foul in pool, as where the cue ball is put into a pocket or jumps off the table. # A shot which scores by chance and not as intended by the player; a fluke.

Scratch as a noun (slang):

Money.

Scratch as a noun:

A feed, usually a mixture of a few common grains, given to chickens.

Scratch as a noun (in the plural):

Minute, but tender and troublesome, excoriations, covered with scabs, upon the heels of horses which have been used where it is very wet or muddy.

Scratch as a noun:

A kind of wig covering only a portion of the head.

Scratch as a noun (music):

A genre of Virgin Islander music, better known as fungi.

Scratch as an adjective:

For or consisting of preliminary or tentative, incomplete, etc. work.

Scratch as an adjective:

Hastily assembled, arranged or constructed, from whatever materials are to hand, with little or no preparation

Scratch as an adjective (computing, from [[scratchpad]]):

Relating to a data structure or recording medium attached to a machine for testing or temporary use.

Scratch as an adjective (sports):

(of a player) Of a standard high enough to play without a handicap, i.e. to compete without the benefit of a variation in scoring based on ability.