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.
Function
Part of speech: verb
Definition: to have a functionto carry on a function; to be in action
Part of speech: noun
Definition: What something does or is used for.A professional or official position.An official or social occasion.A relation where one thing is dependent on another for its existence, value, or significance.A relation in which each element of the domain is associated with exactly one element of the codomain.A routine that receives zero or more arguments and may return a result.The physiological activity of an organ or body part.The characteristic behavior of a chemical compound.