Which to use
“span” and “spasm” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #6,416
- “span” frequency rank
- #35,950
- “spasm” frequency rank
- 42366
- confusion score
Side-by-Side Comparison
| Feature | span | spasm |
|---|---|---|
| Definition | The full width of an open hand from the end of the thumb to the end of the little finger used as an informal unit of length. | A sudden, involuntary contraction of a muscle, a group of muscles, or a hollow organ. |
Where the eye mixes span and spasm
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between span and spasm
A purely visual mix-up. span (/spæn/) and spasm (/ˈspæz.m̩/) 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 42366, derived from the frequency rank of both members and their visual similarity.
span is recorded at frequency rank #6,416, classified as anoun, pronounced /spæn/. spasm is at rank #35,950, tagged as anoun, pronounced /ˈspæz.m̩/.
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 42366, this pair ranks #249,917 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of span vs spasm
Shared letters: aps. Private to "span": n. Private to "spasm": m.
"span" · 4 letters · shape CCVC · "spasm" · 5 letters · shape CCVCC
Known mistypes of this pair
Frequently Asked Questions
Can "span" and "spasm" be used interchangeably?
Which is more common, "span" or "spasm"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "span" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "spasm" - compare definitions side by side with the headword page. Word entry
- This pair ranks #249,917 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "span" and "spasm" also get mixed up with nearby pairs, the highest-scored neighbour is "spasm vs Stasi". 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 #249,917 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.