The best replacement for lag is lead.

The best alternatives to lag are rated as following:
★★★★★  lead
★★★★  lacp
★★★  tag
★★★  log
★★★  latency
★★  lag
★  slack
★  etherchannel
★  tag poker
★  lack
★  mlag
★  trunk
★  proptosis
★  lead measure
  bat drag
  boost threshold
  leg
  2 step

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

Other search terms related to lag and their ratings are:
★★★★★ fraps
★★★★ wireless mouse
★★ turbo
★★ league of legends
★ straight leg raise
★ hdtv
★ digital cameras
bandicam
hamachi
You have in mind a companion for lag and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lag in all years. Click on graph for more.
lag
lead
lacp