Impulse
Part of speech: noun
Definition: A wish or urge, particularly a sudden one. The integral of force over time.
Example sentence: As I look back and connect the dots, all I want to do is go back and hug my scared young self, who took a lot of steps out of impulse not knowing what will happen. So many nights of disappointment, so many others of being disillusioned where I would have just gone ahead and quit it all - I still do not know what kept me hanging in there.
Urge
Part of speech: noun
Definition: A strong desire; an itch to do something.
Part of speech: verb
Definition: To press; to push; to drive; to impel; to force onward.To press the mind or will of; to ply with motives, arguments, persuasion, or importunity.To provoke; to exasperate.To present in an urgent manner; to insist upon.To treat with forcible means; to take severe or violent measures with; as, to urge an ore with intense heat.To press onward or forward.To be pressing in argument; to insist; to persist.
Example sentence: Very few people possess true artistic ability. It is therefore both unseemly and unproductive to irritate the situation by making an effort. If you have a burning, restless urge to write or paint, simply eat something sweet and the feeling will pass.