The best replacement for commendation is recommendation.

The best alternatives to commendation are rated as following:
★★★★★  recommendation
★★  accommodation
★  citation
  meritorious mast
  appreciation
  letter of appreciation

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Speaking about commendation, one probably shouldn't forget about masters.

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



Google Trends

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commendation
recommendation
accommodation