Which to use
“addition” is a noun and “additional” is an adjective - they look or sound alike but fill different roles in a sentence.
- #1,037
- “addition” frequency rank
- #1,115
- “additional” frequency rank
- 2152
- confusion score
Side-by-Side Comparison
| Feature | addition | additional |
|---|---|---|
| Definition | The act of adding anything. | Supplemental or added to something. |
Where the eye mixes addition and additional
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence.
Visual trap between addition and additional
These two trip readers on the page rather than in the ear: addition is /əˈdɪʃ.ən/ while additional is /əˈdɪʃənəl/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “addition” sits inside “additional”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 2152, derived from the frequency rank of both members and their visual similarity.
addition is recorded at frequency rank #1,037, classified as anoun, pronounced /əˈdɪʃ.ən/. additional is at rank #1,115, tagged as anadj, pronounced /əˈdɪʃənəl/.
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 2152, this pair ranks #525,737 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of addition vs additional
Shared letters: adinot. Private to "addition": -. Private to "additional": l.
"addition" · 8 letters · shape VCCVCVVC · "additional" · 10 letters · shape VCCVCVVCVC
Known mistypes of this pair
- addition ← addiiton · addision · additino · additionn · additoin · addittion · addtiion · adidtion
- additional ← addiitonal · additinoal · additioanl · additionall · additionla · additionnal · additoinal · addittional
Frequently Asked Questions
Do "addition" and "additional" mean the same thing in a sentence?
Which is more common, "addition" or "additional"?
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 "addition" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "additional" - compare definitions side by side with the headword page. Word entry
- This pair ranks #525,737 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "addition" and "additional" also get mixed up with nearby pairs, the highest-scored neighbour is "adaption vs addition". 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 #525,737 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.