The difference between Blooper and Boo-boo

When used as nouns, blooper means a blunder, an error, whereas boo-boo means a mistake or error.

Boo-boo is also verb with the meaning: to defecate.

check bellow for the other definitions of Blooper and Boo-boo

Blooper as a noun (informal):

A blunder, an error.

Examples:

"synonyms boo-boo faux pas fluff gaffe lapse mistake slip stumble Thesaurus:error"
Blooper as a noun (baseball, slang):

A fly ball that is weakly hit just over the infielders.

Examples:

"synonyms banjo hit flare Texas leaguer"
Blooper as a noun (film, informal):

A filmed or videotaped outtake that has recorded an amusing accident and/or mistake.
Blooper as a noun (nautical):

A gaff-rigged fore-and-aft sail set from and aft of the aftmost mast of a square-rigged ship; a spanker.
Blooper as a noun (US, dated):

A radio which interferes with other radios, causing them to bloop (squeal loudly).

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.