Which to use
“experiment” is a noun and “experimental” is an adjective - they look or sound alike but fill different roles in a sentence.
- #3,751
- “experiment” frequency rank
- #4,447
- “experimental” frequency rank
- 8198
- confusion score
Side-by-Side Comparison
| Feature | experiment | experimental |
|---|---|---|
| Definition | A test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy or likelihood of something previously untried. | Pertaining to or founded on experiment. |
Where the eye mixes experiment and experimental
Muted = shared; highlighted = the visual trap. They share 10 letters in sequence.
Why the eye confuses experiment with experimental
These two trip readers on the page rather than in the ear: experiment is /ɪkˈspɛɹ.ɪ.mənt/ while experimental is /ɪkspɛɹəˈmɛntəl/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “experiment” sits inside “experimental”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 8198, derived from the frequency rank of both members and their visual similarity.
experiment is recorded at frequency rank #3,751, classified as anoun, pronounced /ɪkˈspɛɹ.ɪ.mənt/. experimental is at rank #4,447, tagged as anadj, pronounced /ɪkspɛɹəˈmɛntəl/.
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 8198, this pair ranks #503,707 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of experiment vs experimental
Shared letters: eimnprtx. Private to "experiment": -. Private to "experimental": al.
"experiment" · 10 letters · shape VCCVCVCVCC · "experimental" · 12 letters · shape VCCVCVCVCCVC
Known mistypes of this pair
- experiment ← epxeriment · exepriment · expeirment · experiemnt · experimennt · experimentt · experimetn · experimment
- experimental ← epxerimental · exeprimental · expeirmental · experiemntal · experimenatl · experimenntal · experimentall · experimentla
Frequently Asked Questions
Is swapping "experiment" for "experimental" ever safe?
Frequency check: "experiment" vs "experimental" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "experiment" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "experimental" - compare definitions side by side with the headword page. Word entry
- This pair ranks #503,707 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "experiment" and "experimental" also get mixed up with nearby pairs, the highest-scored neighbour is "expedient vs experiment". 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 #503,707 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.