Motive
Part of speech: verb
Definition: To prompt or incite by a motive or motives; to move.
Part of speech: adjective
Definition: Causing motion; having power to move, or tending to move; as, a motive argument; motive power. Relating to motion and/or to its cause
Part of speech: noun
Definition: An incentive to act; a reason for doing something; anything that prompted a choice of action. ; a theme or subject, especially one that is central to the work or often repeated.
Purpose
Part of speech: verb
Definition: Have set as one's purpose; resolve to accomplish; intend; plan.(passive) Designed for some purpose.
Part of speech: noun
Definition: An object to be reached; a target; an aim; a goal.A result that is desired; an intention.The act of intending to do something; resolution; determination.The subject of discourse; the point at issue.The reason for which something is done, or the reason it is done in a particular way.