Blooper and Looper

Blooper noun - An embarrassing mistake.

Looper and blooper are semantically related In some cases you can use "Looper" instead a noun "Blooper".

Looper noun - Small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae.

Blooper and looper are semantically related in baseball hit high in the air topic. You can use "Blooper" instead a noun "Looper".