The best replacement for waist is waste.

The best alternatives to waist are rated as following:
★★★★★  waste
★★★★  hip
★★  hips
★★  seat harness
★  length first
★  hip ratio
★  inseam
★  hip measurement
★  natural waist
★  inseam first
★  pant size
★  abdomen
★  hip size
★  hip measurements
  abdominal girth
  loin
  control top
  low waist
  long waist
  hips measurement
  knees
  belt size

Your alternative for waist is not listed? Suggest!
Speaking about waist, one probably shouldn't forget about a-line skirt.

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



Google Trends

Scale is based on the average worldwide traffic of waist in all years. Click on graph for more.
waist
waste
hip