The best replacement for mitre saw is table saw.

The best alternatives to mitre saw are rated as following:
★★★★★  table saw
★★  circular saw
★★  compound mitre saw
★★  chop saw
★  radial arm saw
★  mitre saw
★  sliding compound mitre saw
  miter saw
  mitre box
  sliding mitre saw

Your alternative for mitre saw is not listed? Suggest!
Speaking about mitre saw, one probably shouldn't forget about trenching.

Other search terms related to mitre saw and their ratings are:
★★★★★ trenching
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mitre saw
table saw
circular saw