The best replacement for tack is tact.

The best alternatives to tack are rated as following:
★★★★★  tact
★★★★★  jibe
★  tie bar
★  gybe
★  intact
★  bladder sling
★  lapel pin
★  in tact
  western tack
  jib
  push pin
  wear
  starboard tack
  tac
  port tack

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

Other search terms related to tack and their ratings are:
★★★★★ hysterectomy
★★ doubt model horse tack
You have in mind a companion for tack and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tack in all years. Click on graph for more.
tack
tact
jibe