The best replacement for contusion is hematoma.

The best alternatives to contusion are rated as following:
★★★★★  hematoma
★★★  bruise
★★★  ecchymosis
★★  concussion
★★  fracture
★★  abrasion
★  laceration
★  intracerebral hematoma
  concussion brain
  cerebral concussion
  concussion which is worse
  hemorrhage
  haematoma
  bruises
  occult fracture

Your alternative for contusion is not listed? Suggest!
Speaking about contusion, one probably shouldn't forget about acl tear.

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



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contusion
hematoma
bruise