phase

n.

phase applies to any of the ways in which something may be observed, considered, or presented, and often refers to a stage in development or in a cycle of changes the phases of the moon; aspect emphasizes the appearance of a thing as seen or considered from a particular point of view to consider a problem from all aspects; facet literally or figuratively applies to any of the faces of a many-sided thing the facets of a diamond, another facet of her personality; angle suggests a specific aspect seen from a point of view sharply limited in scope, or, sometimes, an aspect seen only by a sharply acute observer he knows all the angles