Noun: The blow to the side of his skull left a visible bruise.

Noun: The bullet penetrated through the side of his skull, causing a severe injury.

Adjective: She suffered from a painful side-of-skull headache.

Adjective: The side-of-skull injury required immediate medical attention.

Adverb: He was hit forcefully on the side of the skull during the boxing match.

Adverb: The bullet grazed the skull, leaving a shallow wound on the side.