Which to use
“interpolation” and “interrogation” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #34,941
- “interpolation” frequency rank
- #13,738
- “interrogation” frequency rank
- 48679
- confusion score
Side-by-Side Comparison
| Feature | interpolation | interrogation |
|---|---|---|
| Definition | An abrupt change in elements, with continuation of the first idea. | The act of interrogating or questioning; an examination by questions; an inquiry. |
Where the eye mixes interpolation and interrogation
Muted = shared; highlighted = the visual trap. They share 11 letters in sequence.
Look-alike desk: interpolation vs interrogation
A purely visual mix-up. interpolation (/ɪnˌtɜː.pəˈleɪʃən/) and interrogation (/ɪnˌteɹ.əˈɡeɪ.ʃən/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 48679, derived from the frequency rank of both members and their visual similarity.
interpolation is recorded at frequency rank #34,941, classified as anoun, pronounced /ɪnˌtɜː.pəˈleɪʃən/. interrogation is at rank #13,738, tagged as anoun, pronounced /ɪnˌteɹ.əˈɡeɪ.ʃən/.
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 48679, this pair ranks #190,766 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of interpolation vs interrogation
Shared letters: aeinort. Private to "interpolation": lp. Private to "interrogation": g.
"interpolation" · 13 letters · shape VCCVCCVCVCVVC · "interrogation" · 13 letters · shape VCCVCCVCVCVVC
Known mistypes of this pair
- interpolation ← inetrpolation · innterpolation · inteprolation · interoplation · interploation · interpoaltion · interpolaiton · interpolasion
- interrogation ← inetrrogation · innterrogation · interogation · interorgation · interrgoation · interroagtion · interrogaiton · interrogasion
Frequently Asked Questions
Is swapping "interpolation" for "interrogation" ever safe?
Frequency check: "interpolation" vs "interrogation" - which ranks higher?
What to do next
Eye-level mix-up between "interpolation" and "interrogation" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "interpolation" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "interrogation" - compare definitions side by side with the headword page. Word entry
- This pair ranks #190,766 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "interpolation" and "interrogation" also get mixed up with nearby pairs, the highest-scored neighbour is "interrogation vs interrogator". 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 #190,766 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.