in·su·lant 
(ĭnsə-lənt, ĭnsyə-)
(ĭnsə-lənt, ĭnsyə-)n.
A material used for insulation; an insulator.
- counterbalance
- counterblow
- counterchange
- countercharge
- counter check
- countercheck
- counterclaim
- counterclaimant
- counterclockwise
- counterconditioning
- countercoup
- countercultural
- counterculture
- counterculturist
- countercurrent
- countercurrently
- countercyclical
- counterdemonstration
- counterdemonstrator
- counterespionage
- counterexample
- counterfactual
- counterfeit
- counterfeiter
- counterfoil