The best replacement for inform is persuade.

The best alternatives to inform are rated as following:
★★★★★  persuade
★★★★  advise
★★★★  tell
★★★  notify
★★★  educate
★★★  tads
★★★  explain
★★  inform
★★  instruct
★★  intimate
★  entertain
★  informed
★  trap
★  rave
★  enform
★  to persuade
  announce
  persuade is:
  persuade is

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Speaking about inform, one probably shouldn't forget about regrets.

Other search terms related to inform and their ratings are:
★★★★★ regrets
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Google Trends

Scale is based on the average worldwide traffic of inform in all years. Click on graph for more.
inform
persuade
advise