Impulsion

n.	1.
	1.	The act of impelling or driving onward, or the state of being impelled; the sudden or momentary agency of a body in motion on another body; also, the impelling force, or impulse.
	2.	Influence acting unexpectedly or temporarily on the mind; sudden motive or influence; impulse.

Noun	1.	impulsion - a force that moves something along Synonyms: drift, impetus
	2.	impulsion - the act of applying force suddenly; "the impulse knocked him over" Synonyms: impetus, impulse

drift, force, impel, impetus