Conspiracy has been a word for much longer than coincidence. conspiracylate 14c., from L. conspiratio, noun of action from conspirare (see conspire); earlier conspiration (c.1300), from Fr. conspiration (13c.), from L. conspirationem, acc. of conspiratio.People realized that not everything is a conspiracy, so they invented a new word...coincidence.Some people here would do well to remember that no