The best replacement for starch is flour.

The best alternatives to starch are rated as following:
★★★★★  flour
★★★★★  sugar
★★★★  cellulose
★★★★  glycogen
★★  sizing
★★  carbohydrate
★★  glucose
★  corn starch
★  no starch
★  vegetable
★  potato flour
★  corn meal
★  carbohydrates
★  fruit
★  carb
★  tapioca flour
★  fiber
★  fructose
★  carbs
★  corn flour
  corn syrup
  glucose bigger
  pigments
  gluten
  sucrose
  pudding
  cornstarch
  baby powder
  tapioca
  potato starch
  glucose molecules bigger
  clear jel
  arrowroot

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

Other search terms related to starch and their ratings are:
★★★★★ iodine
★★ amylase
★★ iodine reaction
★ benedict's solution
★ salivary amylase
★ flour
★ ironing
saliva
iodine solution
iodine test
amylase reaction
You have in mind a companion for starch and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of starch in all years. Click on graph for more.
starch
flour
sugar