The word "pre-contriving" essentially means to plan or prepare something in advance. There are a number of synonyms that can be used in place of "pre-contriving" depending on the context in which it is used. Some possible synonyms include pre-planning, forethought, foresight, anticipation, preparation, premeditation, calculation, deliberation, and strategizing. Each of these words conveys a sense of careful thought and consideration in advance, and can be used to describe a wide range of activities from preparing for a presentation to plotting out a long-term business strategy. Ultimately, the choice of synonym will depend on the specific context and intended meaning of the statement in which it appears.