The best replacement for spa is hot tub.

The best alternatives to spa are rated as following:
★★★★★  hot tub
★★★★  jacuzzi
★★  pool
★★  mystic tan
★★  epa
★★  sauna
★  mvc
★  massage
★  salon
★  dermatologist
★  hot oil
★  salon games
★  cortislim
★  normes
  asp.net mvc
  chlorine
  hot tub difference
  buying a jacuzzi
  artesian spa
  mystic
  small pool
  spa
  nuface
  beauty salon
  hot springs spa
  swimming pool
  health farm
  day spa
  artesian
  spa castle
  winery
  medical spa
  hot springs
  above ground
  above ground spa
  zantrex 3
  beachcomber
  xenadrine
  free standing spa
  retreat

Your alternative for spa is not listed? Suggest!
Speaking about spa, one probably shouldn't forget about steam room.

Other search terms related to spa and their ratings are:
★★★★★ steam room
★★★★★ pool
★★★ angularjs
You have in mind a companion for spa and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of spa in all years. Click on graph for more.
spa
hot tub
jacuzzi