rot vs run, What's the Difference?

Which to use

“rot” and “run” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#11,285
“rot” frequency rank: #309
“run” frequency rank: 11594
confusion score

Side-by-Side Comparison

Feature	rot	run
Definition	To suffer decomposition due to biological action, especially by fungi or bacteria.	To move swiftly.

Where the eye mixes rot and run

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

rot

3 ch

run

Why the eye confuses rot with run

A purely visual mix-up. rot (/ɹɒt/) and run (/ɹʌn/) 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 11594, derived from the frequency rank of both members and their visual similarity.

rot is recorded at frequency rank #11,285, classified as averb, pronounced /ɹɒt/. run is at rank #309, tagged as averb, pronounced /ɹʌn/.

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 11594, this pair ranks #486,198 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of rot vs run

Shared letters: r. Private to "rot": ot. Private to "run": nu.

"rot" · 3 letters · shape CVC · "run" · 3 letters · shape CVC

Frequently Asked Questions

Do "rot" and "run" mean the same thing in a sentence?

No. They are said differently (/ɹɒt/ versus /ɹʌn/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Frequency check: "rot" vs "run" - which ranks higher?

"run" is the more common of the two: it sits at frequency rank #309 in our English list, against #11,285 for "rot". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "rot" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "run" - compare definitions side by side with the headword page. Word entry
This pair ranks #486,198 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"rot" and "run" also get mixed up with nearby pairs, the highest-scored neighbour is "rot vs Rua". Nearby pair

Confusion rank #486,198 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.