Configuration
Part of speech: noun
Definition: Form, as depending on the relative disposition of the parts of a thing's shape; figure. Relative position or aspect of the planets; the face of the horoscope, according to the relative positions of the planets at any time. The way things are arranged or put together in order to achieve a result. The arrangement of electrons in an atom, molecule, or other physical structure like a crystal.
Setup
Part of speech: noun
Definition: Equipment designed for a particular purpose; an apparatus.The fashion in which something is organized or arranged.An act to frame someone; an effort or arrangement aimed at placing the blame on somebody.A computer software utility designed to install the necessary components and perform configuration necessary for a new software application. Also used as an adjective: e.g. "setup program".