The difference between Boo-boo and Owie

When used as nouns, boo-boo means a mistake or error, whereas owie means a painful but minor injury.

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

Owie is also interjection with the meaning: same as ow.

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

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.

Owie as a noun (colloquial, North America, childish):

A painful but minor injury.