The best replacement for tummy is stomach.

The best alternatives to tummy are rated as following:
★★★★★  stomach
★★★  spanx
★★★  belly
  spanks

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

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



Google Trends

Scale is based on the average worldwide traffic of tummy in all years. Click on graph for more.
tummy
stomach
spanx