The best replacement for spindle is router.

The best alternatives to spindle are rated as following:
★★★★★  router
★★★  mutilate
★★★  golgi tendon organ
★★★  knuckle
★★  hub
★★  axle
★★  baluster
★  spinning wheel
★  router cnc
★  arm lift
★  arm lift kit
★  gto
  cake box
  c6 spindle
  chromoly spindle

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

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



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spindle
router
mutilate