Black-and-blue and Boo-boo

Black-and-blue adjective - Discolored by coagulation of blood beneath the skin.

Boo-boo and black-and-blue are semantically related. In some cases you can use "Boo-boo" instead a noun phrase "Black-and-blue".

Boo-boo noun - An unintentional departure from truth or accuracy.

Black-and-blue and boo-boo are semantically related. Sometimes you can replace phrase "Black-and-blue" with "Boo-boo", this phrases are similar.