The best replacement for tightening is tapering.

The best alternatives to tightening are rated as following:
★★★★★  tapering
★★★★★  thermage
★★★★  tummy tuck
★★★★  fillers
★★★  widening
★★★  baby moving
★  refirme

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

Other search terms related to tightening and their ratings are:
★★★★★ contractions
★★★★★ radio frequency
★ tummy tuck
braxton hicks
You have in mind a companion for tightening and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tightening in all years. Click on graph for more.
tightening
tapering
thermage