Which to use
“third” is an adjective and “thud” is a noun - they look or sound alike but fill different roles in a sentence.
- #483
- “third” frequency rank
- #33,056
- “thud” frequency rank
- 33539
- confusion score
Side-by-Side Comparison
| Feature | third | thud |
|---|---|---|
| Definition | The ordinal form of the cardinal number three; Coming after the second. | The sound of a dull impact. |
Where the eye mixes third and thud
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between third and thud
These two trip readers on the page rather than in the ear: third is /θɜːd/ while thud is /ˈθʌd/. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 33539, derived from the frequency rank of both members and their visual similarity.
third is recorded at frequency rank #483, classified as anadj, pronounced /θɜːd/. thud is at rank #33,056, tagged as anoun, pronounced /ˈθʌd/.
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 33539, this pair ranks #328,543 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of third vs thud
Shared letters: dht. Private to "third": ir. Private to "thud": u.
"third" · 5 letters · shape CCVCC · "thud" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Can "third" and "thud" be used interchangeably?
Frequency check: "third" vs "thud" - which ranks higher?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "third" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "thud" - compare definitions side by side with the headword page. Word entry
- This pair ranks #328,543 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "third" and "thud" also get mixed up with nearby pairs, the highest-scored neighbour is "thud vs Thun". 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 #328,543 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.