His spelling is perfect.

He cast the spell.

He found it difficult to spell that word.

My friend is working in Columbus.

The preacher started preaching in the church.

This compound is stabilized by hydrogenation.

He hydrogenated fatty acids in a chemical experiment.

Thales was an ancient Greek philosopher.

The Shonagon was an important position in the court during the Heian period.

Ramesses was a great pharaoh of ancient Egypt.