Which to use
“spacer” and “spanner” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #35,947
- “spacer” frequency rank
- #48,499
- “spanner” frequency rank
- 84446
- confusion score
Side-by-Side Comparison
| Feature | spacer | spanner |
|---|---|---|
| Definition | A person who works or lives in space. | A hand tool for adjusting nuts and bolts. |
Where the eye mixes spacer and spanner
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Why the eye confuses spacer with spanner
A purely visual mix-up. spacer (/ˈspeɪsɚ/) and spanner (/ˈspæn.ə/) 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 84446, derived from the frequency rank of both members and their visual similarity.
spacer is recorded at frequency rank #35,947, classified as anoun, pronounced /ˈspeɪsɚ/. spanner is at rank #48,499, tagged as anoun, pronounced /ˈspæn.ə/.
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 84446, this pair ranks #12,064 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of spacer vs spanner
Shared letters: aeprs. Private to "spacer": c. Private to "spanner": n.
"spacer" · 6 letters · shape CCVCVC · "spanner" · 7 letters · shape CCVCCVC
Known mistypes of this pair
Frequently Asked Questions
Do "spacer" and "spanner" mean the same thing in a sentence?
Which is more common, "spacer" or "spanner"?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "spacer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "spanner" - compare definitions side by side with the headword page. Word entry
- This pair ranks #12,064 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "spacer" and "spanner" also get mixed up with nearby pairs, the highest-scored neighbour is "spanner vs Spenser". 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 #12,064 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.