S: (n) series (similar things placed in order or happening one after another) "they were investigating a series of bank robberies"
S: (n) ordering, order, ordination (logical or comprehensible arrangement of separate elements) "we shall consider these questions in the inverse order of their presentation"
S: (n) arrangement (an orderly grouping (of things or persons) considered as a unit; the result of arranging) "a flower arrangement"