Penryn is my best friend.

The entire movie was wonderful.

I put a cloth patch on my new jacket.

His new novel is full of suspense, and once you start reading, you can't stop.

He issued instructions to newly organize the troops.

Pentaerythritol tetranitrate is a type of explosive and is very dangerous.

I used pentyne in an organic chemistry experiment.

This new compilation of textbooks is packed with the latest information.

Aldopentose is a type of carbohydrate, an aldose with five carbon atoms.

Ketopentose is a type of monosaccharide with five carbon atoms.