Which to use
“sped” is a verb and “speedo” is a noun - they look or sound alike but fill different roles in a sentence.
- #20,782
- “sped” frequency rank
- #42,415
- “speedo” frequency rank
- 63197
- confusion score
Side-by-Side Comparison
| Feature | sped | speedo |
|---|---|---|
| Definition | simple past and past participle of speed | A speedometer, particularly one in a race car or other automobile. |
Letter map: sped vs speedo
Shared letters muted; letters that set sped and speedo apart highlighted. Shared run: 4. sped runs 4 letters (CCVC) against speedo's 6 (CCVVCV) - the length gap alone is often enough to separate them once you know to check it.
Grammar separator: sped vs speedo
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sped is averb and speedoanoun. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 63197, derived from the frequency rank of both members and their visual similarity.
sped is recorded at frequency rank #20,782, classified as averb, pronounced /spɛd/. speedo is at rank #42,415, tagged as anoun.
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 63197, this pair ranks #84,311 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of sped vs speedo
Shared letters: deps. Private to "sped": -. Private to "speedo": o.
"sped" · 4 letters · shape CCVC · "speedo" · 6 letters · shape CCVVCV
Known mistypes of this pair
Frequently Asked Questions
Do "sped" and "speedo" mean the same thing in a sentence?
Frequency check: "sped" vs "speedo" - which ranks higher?
What to do next
Pair "sped" vs "speedo" is on the table, pick a follow-up below.
- Full dictionary entry for "sped" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "speedo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #84,311 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sped" and "speedo" also get mixed up with nearby pairs, the highest-scored neighbour is "speedo vs speer". 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 #84,311 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.