The best replacement for variant is variation.

The best alternatives to variant are rated as following:
★★★★★  variation
★★★  variant
★★  invariant
★★  version
★★  mutation
★  vantage
★  paladin hybrid
★  vantage smith
★  object vba
  octavia combi
  isoform
  superb combi
  shoei hornet

Your alternative for variant is not listed? Suggest!
Speaking about variant, one probably shouldn't forget about speech loss.

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



Google Trends

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