The best replacement for profit sharing is 401k.

The best alternatives to profit sharing are rated as following:
★★★★★  401k
★★★★  gain sharing
★★★  bonus
★★  stock options
★★  ownership
★★  pension
★  revenue sharing
★  safe harbor
★  esop
★  pension plan
  401k plan
  money purchase plan
  money purchase
  401 k
  defined benefit plan
  profit sharing
  defined benefit

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Speaking about profit sharing, one probably shouldn't forget about 401k.

Other search terms related to profit sharing and their ratings are:

★★★★★ 401k
safe harbor
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profit sharing
gain sharing