The best replacement for peak is peek.

The best alternatives to peak are rated as following:
★★★★★  peek
★★★★  off peak
★★★★  rms
★★  trough
★★  notch lapel
★★  pique
★  summit
★  notch lapel tuxedo
★  prestone
★  rms compression
★  rms voltage
★  notch
  rms watts
  vo2 max
  rms power
  volcano
  sneak peek
  mountain
  camelback
  renzetti
  apex
  peak to peak
  snohomish
  rocky mountain national park
  riverbed
  chester
  lake district
  usb3
  pique interest

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

Other search terms related to peak and their ratings are:
★★★★★ bangs
★★ clearblue fertility monitor
You have in mind a companion for peak and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of peak in all years. Click on graph for more.
peak
peek
off peak