- Driving force outside momentous stadium - Driving power or strength - Force of a moving mass - Impetus - The quantity of motion in a moving body, being always
proportioned to the quantity of matter multiplied into the velocity;
impetus. - Essential element, or constituent element.
- Energy - Existence - Liveliness - Living - Spirit - Vitality - The state of being which begins with generation, birth, or
germination, and ends with death; also, the time during which this
state continues; that state of an animal or plant in which all or any
of its organs are capable of performing all or any of their functions;
-- used of all animal and vegetable organisms.