I saw the first word repeatedly while watching telecasts of the 2008 Olympics.

Problem:
Because these two words are homophones, context is required to distinguish them in speech.

Explanation:
A “scull” — spelled S-C-U-L-L — as a noun is an oar, often with a cupped blade, and often mounted on a fulcrum at a small boat’s stern.

It is this S-C word that repeatedly was spoken and displayed in the TV coverage of the 2008 Olympics.

A “skull” — spelled S-K-U-L-L — as a noun is the bones that make up the head of an animal.

Each of these words can also be used as a verb.

The word “scull” — spelled with a “c” — as a verb means to propel by means of one or more sculls.

The word “skull” — spelled with a “k” — as a verb means to strike a blow to the head.

Although some lexicographers believe that both words come from the French word “escuelle”, which means dish, many others believe that “scull” — with a “c” — comes from the Middle English word “sculle” and that “skull” — with a “k” — comes from the Old Norse word “skalli”, which means bald head and also is spelled with a “k”.

Solution:
Think “rowing oar” when you see “scull” with a “c” or when the spoken context implies a reference to rowing. Think “head” when you see “skull” with a “k” or when the spoken context implies a reference to the head.