The best replacement for prefix is suffix.

The best alternatives to prefix are rated as following:
★★★★★  suffix
★★  suffix dictionary
★★  suffix words
★★  suffix list
★★  postfix
★  suffix worksheet
★  root
★  suffix name
★  root words
★  subnet
★  reflex otterbox
  salutation
  suffix games
  preface
  suffix example
  area code
  prepend
  affix
  before

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

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



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prefix
suffix
suffix dictionary