Which to use
“octane” and “outage” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #26,190
- “octane” frequency rank
- #20,727
- “outage” frequency rank
- 46917
- confusion score
Side-by-Side Comparison
| Feature | octane | outage |
|---|---|---|
| Definition | Any of the eighteen isomeric aliphatic hydrocarbons (C₈H₁₈) found in petroleum, especially an iso-octane 2,2,4 trimethyl-pentane; they are used as fuels and solvents. | A temporary suspension of operation, especially of electrical power supply. |
Where the eye mixes octane and outage
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. octane (VCCVCV) and outage (VVCVCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Why the eye confuses octane with outage
A purely visual mix-up. octane (/ˈɒkteɪn/) and outage (/ˈaʊ.tɪd͡ʒ/) 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 46917, derived from the frequency rank of both members and their visual similarity.
octane is recorded at frequency rank #26,190, classified as anoun, pronounced /ˈɒkteɪn/. outage is at rank #20,727, tagged as anoun, pronounced /ˈaʊ.tɪd͡ʒ/.
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 46917, this pair ranks #207,278 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of octane vs outage
Shared letters: aeot. Private to "octane": cn. Private to "outage": gu.
"octane" · 6 letters · shape VCCVCV · "outage" · 6 letters · shape VVCVCV
Known mistypes of this pair
Frequently Asked Questions
Do "octane" and "outage" mean the same thing in a sentence?
Which is more common, "octane" or "outage"?
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 "octane" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "outage" - compare definitions side by side with the headword page. Word entry
- This pair ranks #207,278 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "octane" and "outage" also get mixed up with nearby pairs, the highest-scored neighbour is "Otago vs outage". 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 #207,278 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.