Which to use
“sped” is a verb and “speed” is a noun - they look or sound alike but fill different roles in a sentence.
- #20,782
- “sped” frequency rank
- #1,099
- “speed” frequency rank
- 21881
- confusion score
Side-by-Side Comparison
| Feature | sped | speed |
|---|---|---|
| Definition | simple past and past participle of speed | The state of moving quickly or the capacity for rapid motion. |
Where the spellings diverge
Shared letters are muted; the letters that actually set sped and speed apart are highlighted. They share 4 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
sped and speed form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 1 letter(s) in length - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 21881, 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/. speed is at rank #1,099, tagged as anoun, pronounced /spiːd/.
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 21881, this pair ranks #420,676 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "sped" and "speed" be used interchangeably?
Remembering sped vs speed
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “sped”; for a noun, it's “speed”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “sped” entry
- Browse more pairs most likely to be confused. Most confusable