Which to use
“thru” is a preposition and “tor” is a noun - they look or sound alike but fill different roles in a sentence.
- #9,266
- “thru” frequency rank
- #13,625
- “tor” frequency rank
- 22891
- confusion score
Side-by-Side Comparison
| Feature | thru | tor |
|---|---|---|
| Definition | Nonstandard spelling of through. | A craggy outcrop of rock on the summit of a hill, created by the erosion and weathering of rock. |
Where the eye mixes thru and tor
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses thru with tor
These two trip readers on the page rather than in the ear: thru is /θɹuː/ while tor is /tɔː/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (preposition vs noun), which is usually the fastest check. Our composite confusion score for this pair is 22891, derived from the frequency rank of both members and their visual similarity.
thru is recorded at frequency rank #9,266, classified as aprep, pronounced /θɹuː/. tor is at rank #13,625, tagged as anoun, pronounced /tɔː/.
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 22891, this pair ranks #413,286 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of thru vs tor
Shared letters: rt. Private to "thru": hu. Private to "tor": o.
"thru" · 4 letters · shape CCCV · "tor" · 3 letters · shape CVC
Known mistypes of this pair
- thru ← htru · thhru · thrru · thur · trhu · tthru
Frequently Asked Questions
Is swapping "thru" for "tor" ever safe?
Which is more common, "thru" or "tor"?
What to do next
Eye-level mix-up between "thru" and "tor" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "thru" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "tor" - compare definitions side by side with the headword page. Word entry
- This pair ranks #413,286 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "thru" and "tor" also get mixed up with nearby pairs, the highest-scored neighbour is "Taf vs tor". 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 #413,286 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.