The best replacement for chipboard is plywood.

The best alternatives to chipboard are rated as following:
★★★★★  plywood
★★★★★  osb
★★★★  particle board
★★★★  mdf
★★★  corrugated
★★★  cardboard
★★  plywood flooring
★★  cardstock
★★  mat board
★  paperboard
★  floorboards
★  fibreboard
★  mdf stronger
★  mdf board
  ply
  hardboard

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

Other search terms related to chipboard and their ratings are:
★★★★★ sizzix
★★ floorboards
You have in mind a companion for chipboard and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of chipboard in all years. Click on graph for more.
chipboard
plywood
osb