IPA: /ˌθɜːrməˈrɛɡjʊˌleɪtə/
KK: /ˌθɜrməˈrɛɡjʊˌleɪtər/
A device that automatically controls and maintains a specific temperature.
The thermoregulator helps keep the room at a comfortable temperature regardless of the weather outside.
Thermoregulator → It is formed from "thermo-" (from Greek "thermos", meaning heat) and "regulator" (from Latin "regulare", meaning to control or direct). The word "thermoregulator" refers to a device or mechanism that controls or directs heat to maintain a stable temperature.
Think of 'heat' ('thermo-') being 'controlled' ('regulare') — that's what a thermoregulator does, it helps manage temperature.
No commonly confused words.