Which to use
“pontoon” and “portion” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #40,842
- “pontoon” frequency rank
- #2,848
- “portion” frequency rank
- 43690
- confusion score
Side-by-Side Comparison
| Feature | pontoon | portion |
|---|---|---|
| Definition | A flat-bottomed boat or other floating structure used as a buoyant support for a temporary bridge, dock or landing stage. | An allocated amount. |
Where the eye mixes pontoon and portion
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Why the eye confuses pontoon with portion
A purely visual mix-up. pontoon (/pɒnˈtuːn/) and portion (/ˈpoɹʃən/) 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 43690, derived from the frequency rank of both members and their visual similarity.
pontoon is recorded at frequency rank #40,842, classified as anoun, pronounced /pɒnˈtuːn/. portion is at rank #2,848, tagged as anoun, pronounced /ˈpoɹʃən/.
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 43690, this pair ranks #237,558 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of pontoon vs portion
Shared letters: nopt. Private to "pontoon": -. Private to "portion": ir.
"pontoon" · 7 letters · shape CVCCVVC · "portion" · 7 letters · shape CVCCVVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "pontoon" for "portion" ever safe?
Which is more common, "pontoon" or "portion"?
Useful next steps
Eye-level mix-up between "pontoon" and "portion" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "pontoon" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "portion" - compare definitions side by side with the headword page. Word entry
- This pair ranks #237,558 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "pontoon" and "portion" also get mixed up with nearby pairs, the highest-scored neighbour is "pontoon vs potion". 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 #237,558 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.