The word preorganized is an adjective that refers to something that is already planned or arranged in advance. Synonyms for preorganized include preplanned, predetermined, prearranged, preconceived, premeditated, and preordained. These words refer to the concept of something being formed or decided upon before it happens. For example, a preplanned event is one that has been organized in advance, while a preordained outcome is one that is predetermined and inevitable. These synonyms are useful for expressing the idea that something has been thought-out and established prior to its actual occurrence.