thermostat

/ˈθɝməstæt/

//ˈθɝməstæt// noun

By · According to Wiktionary data (CC BY-SA) ·

"thermostat" is a 10-letter English headword indexed on PlainSpell.

The verdict

“thermostat” has 16 generated spelling variants in the English index at frequency #25,613. The variants make it a useful spelling check.

#25,613
frequency rank, English
3,151
“T” headwords
16
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A device that automatically responds to changes in temperature by activating a heating or cooling system to maintain the temperature at a desired setting.

Corpus desk

Index EN-thermostat · thermostat · English

thermostat · rank #25,613 · 16 variants · 0 confusables

  • FREQ-MID #25,613
  • LEN-MEGA 10 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 16 variants
  • BOOK-MID 3,151
  • PHOTO-FINISH thermodynamics

Nearest frequency peer: thermodynamics (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “thermostat”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “thermostat” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for thermostat
PropertyValue
Headwordthermostat
LanguageEnglish
Part of speechNoun
IPA/ˈθɝməstæt/
Letters10
Frequency rank#25,613
Misspellings tracked16
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “thermostat”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).thermostatlands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “thermodynamics” (#25,612), “tiki” (#25,615), “tangle” (#25,610). Among 3,151 “T” headwords, “thermostat” is #25,613. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 16 spelling variants around thermostat (IPA /ˈθɝməstæt/), anoun. Corpus frequency is #25,613 among 3,151 “T” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 16 likely wrong-spelling variants for thermostat, with forms such as "htermostat", "tehrmostat", and "themrostat". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From thermo- + -stat. The correct English form is thermostat, spelled T-H-E-R-M-O-S-T-A-T.

Definition

  1. 1
    A device that automatically responds to changes in temperature by activating a heating or cooling system to maintain the temperature at a desired setting.
  2. 2
    An algorithm used to maintain a simulated system at a set temperature by absorbing or releasing heat

Recorded use

Wiktionary example

These source excerpts show how thermostat appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. A smart thermostat can give you remote control over your heating and air conditioning, making sure your home is as cool or toasty as you like when you get home from work or wherever else, and a great one can monitor environmental conditions and your own preferences over time, adjust your systems to keep you comfortable and save you money. That’s why we sp…

Etymology

From thermo- + -stat.

This word in other languages

termostato(Español)thermostat(Français)Thermostat(Deutsch)

Common misspellings

Also misspelled as:

  • htermostat
  • tehrmostat
  • themrostat
  • thermmostat
  • thermosatt
  • thermosstat
  • thermostatt
  • thermostta
  • thermosttat
  • thermotsat
  • thermsotat
  • theromstat
  • therrmostat
  • thhermostat
  • thremostat
  • tthermostat

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of thermostat - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

htermostat2tehrmostat2themrostat2thermmostat1thermosatt2thermosstat1thermostatt1thermostta2
Edit distance from "thermostat"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "thermostat"?
"thermostat" is spelled T-H-E-R-M-O-S-T-A-T. The IPA pronunciation is /ˈθɝməstæt/.
What does "thermostat" mean?
As a noun, "thermostat" means: A device that automatically responds to changes in temperature by activating a heating or cooling system to maintain the temperature at a desired setting.
What are common misspellings of "thermostat"?
Common misspellings include "htermostat", "tehrmostat", "themrostat", "thermmostat", "thermosatt". The correct spelling is "thermostat".
How do you pronounce "thermostat"?
The IPA (International Phonetic Alphabet) transcription for "thermostat" is /ˈθɝməstæt/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "thermostat"?
From thermo- + -stat. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "thermostat", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

supermodel#25,601stuttering#25,598underlined#25,629unfriendly#25,630

Similar misspelling depth

Headwords with a similar count of attested misspellings (16 here; floor ≥5).

aeronautical16 variantsschoolgirl16 variantsscaffolding16 variantsrationality16 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list