Which to use
“spur” and “sub” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #11,976
- “spur” frequency rank
- #2,236
- “sub” frequency rank
- 14212
- confusion score
Side-by-Side Comparison
| Feature | spur | sub |
|---|---|---|
| Definition | A rigid implement, often roughly y-shaped, that is fixed to one's heel for the purpose of prodding a horse. Often worn by, and emblematic of, the cowboy or the knight. | Abbreviation of submarine. |
Where the eye mixes spur and sub
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: spur vs sub
A purely visual mix-up. spur (/spɜː/) and sub (/sʌb/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 14212, derived from the frequency rank of both members and their visual similarity.
spur is recorded at frequency rank #11,976, classified as anoun, pronounced /spɜː/. sub is at rank #2,236, tagged as anoun, pronounced /sʌb/.
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 14212, this pair ranks #471,405 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of spur vs sub
Shared letters: su. Private to "spur": pr. Private to "sub": b.
"spur" · 4 letters · shape CCVC · "sub" · 3 letters · shape CVC
Known mistypes of this pair
- spur ← psur · sppur · spru · spurr · sspur · supr
Frequently Asked Questions
Is swapping "spur" for "sub" ever safe?
Frequency check: "spur" vs "sub" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "spur" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sub" - compare definitions side by side with the headword page. Word entry
- This pair ranks #471,405 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "spur" and "sub" also get mixed up with nearby pairs, the highest-scored neighbour is "spur vs sura". 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 #471,405 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.