Which to use
“theres” is a contraction and “thermos” is a noun - they look or sound alike but fill different roles in a sentence.
- #8,365
- “theres” frequency rank
- #44,527
- “thermos” frequency rank
- 52892
- confusion score
Side-by-Side Comparison
| Feature | theres | thermos |
|---|---|---|
| Definition | There is; there's. | A bottle, flask or similar vessel having a vacuum between its inner and outer silvered walls; designed to maintain the temperature of its contents |
Letter map: theres vs thermos
Shared letters muted; letters that set theres and thermos apart highlighted. Shared run: 5. theres runs 6 letters (CCVCVC) against thermos's 7 (CCVCCVC) - the length gap alone is often enough to separate them once you know to check it.
Part-of-speech tell for theres / thermos
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: theres is acontraction and thermosanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 52892, derived from the frequency rank of both members and their visual similarity.
theres is recorded at frequency rank #8,365, classified as acontraction. thermos is at rank #44,527, tagged as anoun, pronounced /ˈθɜː.mɒs/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 52892, this pair ranks #153,321 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of theres vs thermos
Shared letters: ehrst. Private to "theres": -. Private to "thermos": mo.
"theres" · 6 letters · shape CCVCVC · "thermos" · 7 letters · shape CCVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "theres" for "thermos" ever safe?
Which is more common, "theres" or "thermos"?
Useful next steps
You've compared "theres" and "thermos". Here's where to go from here.
- Full dictionary entry for "theres" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "thermos" - compare definitions side by side with the headword page. Word entry
- This pair ranks #153,321 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "theres" and "thermos" also get mixed up with nearby pairs, the highest-scored neighbour is "thereon vs thermos". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #153,321 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.