Poltroon
/pɑːlˈtruːn/
Definition 1 of 1
Pro Tip 1/3Archaic Usage
Poltroon is old-fashioned; modern speakers rarely use it, preferring simpler words like 'coward'. 
In the ancient tale, the knight called his challenger a poltroon.
Pro Tip 2/3Literary Flair
Poltroon may appear in literature to add a historical or dramatic tone. 
The villain, a true poltroon at heart, fled at the first sign of trouble.
Pro Tip 3/3Avoid Misuse
Don't confuse poltroon with bravery-related virtues; it solely describes the lack of courage. 
His actions were not valiant but those of a poltroon.