Here are some sentences.
His valor was unquestioned.
A knight must have great valor.
He received a medal of valor for his heroic actions in battle.
The wrestler showed great valor when taking on 3 men at once.
Uncommon valor often goes unrewarded.
Valor
the knight was valour in battle
Cowardice is nearly the opposite in meaning of valor.
The private showed his valor and kind tenaciousness by pulling me to safety while under fire.
The civilians could tell the knight had great valor as he stood to face the ferocious dragon.
The noun 'valor' is an abstract noun; a word for personal bravery in the face of danger; a word for a concept.
Virtus
Valor is courage or bravery.
True valor is facing danger even when afraid.