He proved himself to be a poltroon by running away from the battle.

He is a poltroon man who always avoids confrontations.

The poltroons fled at the first sign of danger.

His poltroonism was evident when he refused to stand up for what he believed in.

He displayed a poltroonish behavior during the crisis.

His poltroonery was evident when he refused to confront the bully.

The poltrooneries of the politicians were exposed during the scandal.

He ran away poltroonishly when he saw the spider.