counterbore
1. [ noun ] a bit for enlarging the upper part of a hole
Synonyms: countersink_bit countersink
Related terms: bit
Similar spelling:   counterfire
  countertenor
  counterexample
  counterbalance
  counterculture
  countercurrent
  counterplea
  countermine
  Conteras
  counterpose
  counterfeit
  counterpane
  countermove
  counterblow
  counterblast
  counterpoise
  counter_tube
  counteroffer
  countercheck
  countercharge
  counterfeiter
  counterchange
  counteractive
  counteraction
  counterperson
  countermelody
  counter_check
  counterweight
  counterpoised
  counterpoison
  counterstrike
  counteract
  countertop
  counterman
  counterspy
  countermeasure
  counterplay
  country_borage
  counterplot
  countervail
  countersuit
  countermand
  countercoup
  counterpart
  counterplan
  countersink
  countersign
  countershot
  counterfoil
  counterglow
  counterclaim
  counterpoint
  counterpunch
  counterwoman
  conterminous
  country_store
  counterstain
  countermarch
  Contreras
  country-bred
  counter-drill
  counterattack
  contrite
  commuter