The difference between Blooper and Blunder

When used as nouns, blooper means a blunder, an error, whereas blunder means a clumsy or embarrassing mistake.

Blunder is also verb with the meaning: to make a clumsy or stupid mistake.

check bellow for the other definitions of Blooper and Blunder

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).

Blunder as a verb (intransitive):

To make a clumsy or stupid mistake.

Examples:

"to blunder in preparing a medical prescription"
Blunder as a verb (intransitive):

To move blindly or clumsily.
Blunder as a verb (transitive):

To cause to make a mistake.
Blunder as a verb (transitive):

To do or treat in a blundering manner; to confuse.