in·su·la·tor 
(ĭnsə-lā′tər, ĭnsyə-)
(ĭnsə-lā′tər, ĭnsyə-)n.
1. A material that insulates, especially a nonconductor of sound, heat, or electricity.
2. A device that insulates.
- remonstrative
- remonstratively
- remonstrator
- remora
- remorse
- remorseful
- remorsefully
- remorsefulness
- remorseless
- remorselessly
- remorselessness
- remote
- remote control
- remote-control
- remote-controlled
- remotely
- remoteness
- remote sensing
- remotion
- remount
- removability
- removable
- removableness
- removably
- removal