The best replacement for deflection is load.

The best alternatives to deflection are rated as following:
★★★★★  load
★★★★★  reflection
★★★★  bending
★★★  strain
★★★  displacement
★★★  load graph
★★★  deformation
★★  deviation
★★  defense neverwinter
★★  benediction
★  deflexion
★  own goal
  azimuth
  nano recharge
  natural frequency
  insolence
  deflection

Your alternative for deflection is not listed? Suggest!
Speaking about deflection, one probably shouldn't forget about overhang.

Other search terms related to deflection and their ratings are:
★★★★★ overhang
You have in mind a companion for deflection and it is not yet here? Propose!



Google Trends

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deflection
load
reflection