Which to use
“instigate” and “investigate” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #38,909
- “instigate” frequency rank
- #4,243
- “investigate” frequency rank
- 43152
- confusion score
Side-by-Side Comparison
| Feature | instigate | investigate |
|---|---|---|
| Definition | To bring about by urging or encouraging. | To inquire into or study in order to ascertain facts or information. |
Where the eye mixes instigate and investigate
Muted = shared; highlighted = the visual trap. They share 9 letters in sequence.
Visual trap between instigate and investigate
A purely visual mix-up. instigate (/ˈɪnstəɡeɪt/) and investigate (/ɪnˈvɛs.tə.ɡeɪt/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 letter(s) in length. Our composite confusion score for this pair is 43152, derived from the frequency rank of both members and their visual similarity.
instigate is recorded at frequency rank #38,909, classified as averb, pronounced /ˈɪnstəɡeɪt/. investigate is at rank #4,243, tagged as averb, pronounced /ɪnˈvɛs.tə.ɡeɪt/.
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 43152, this pair ranks #242,695 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of instigate vs investigate
Shared letters: aeginst. Private to "instigate": -. Private to "investigate": v.
"instigate" · 9 letters · shape VCCCVCVCV · "investigate" · 11 letters · shape VCCVCCVCVCV
Known mistypes of this pair
- instigate ← innstigate · insitgate · insstigate · instgiate · instiagte · instigaet · instigatte · instiggate
- investigate ← inevstigate · innvestigate · invesitgate · invesstigate · investgiate · investiagte · investigaet · investigatte
Frequently Asked Questions
Can "instigate" and "investigate" be used interchangeably?
Frequency check: "instigate" vs "investigate" - which ranks higher?
What to do next
Eye-level mix-up between "instigate" and "investigate" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "instigate" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "investigate" - compare definitions side by side with the headword page. Word entry
- This pair ranks #242,695 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "instigate" and "investigate" also get mixed up with nearby pairs, the highest-scored neighbour is "instigate vs instigator". 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 #242,695 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.