Capacity is an amount of something.
the capacity to do something
Capacity is the amount of space that a container can hold. Gallons, quarts, and pints are all units of capacity.
use dictionary.com
A Hebrew measure of capacity; a homer.
The capacity for work or vigorous activity
The amount or volume a container can hold.
The amount or volume an container can hold.
There is no appropriate definition of energy on the list that follows the question.
A piece of hardware or software operating at maximum capacity.
patience is the capacity of being tolerant and even tempered perseverance.
Numeric constants have the capacity to store numeric value.
Flexibility-a joint's capacity to travel through a full range of motion.