The best replacement for inverse is converse.

The best alternatives to inverse are rated as following:
★★★★★  converse
★★★★  direct
★★★  reciprocal
★★  reverse
★★  direct relationship
★★  direct variation
★  forward kinematics
★  direct graph
★  inverse
★  direct proportion
★  adverse
★  opposite
  reciprocal functions
  direct graphs
  transpose
  direct correlation
  direct variations
  direct relationships

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Speaking about inverse, one probably shouldn't forget about determinant.

Other search terms related to inverse and their ratings are:
★★★★★ determinant
★ matrices
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inverse
converse
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