Which to use
“stiffer” is a noun and “stiller” is an adjective - they look or sound alike but fill different roles in a sentence.
- #36,354
- “stiffer” frequency rank
- #42,921
- “stiller” frequency rank
- 79275
- confusion score
Side-by-Side Comparison
| Feature | stiffer | stiller |
|---|---|---|
| Definition | An erection of the penis. | comparative form of still: more still |
Where the spellings diverge
Shared letters are muted; the letters that actually set stiffer and stiller apart are highlighted. They share 5 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: stiffer is anoun and stilleranadjective. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 79275, derived from the frequency rank of both members and their visual similarity.
stiffer is recorded at frequency rank #36,354, classified as anoun. stiller is at rank #42,921, tagged as anadj.
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 79275, this pair ranks #22,499 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of stiffer vs stiller
Shared letters: eirst. Private to "stiffer": f. Private to "stiller": l.
"stiffer" · 7 letters · shape CCVCCVC · "stiller" · 7 letters · shape CCVCCVC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "stiffer" and "stiller" be used interchangeably?
Which is more common, "stiffer" or "stiller"?
Remembering stiffer vs stiller
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “stiffer”; for an adjective, it's “stiller”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “stiffer” entry
- Browse more pairs most likely to be confused. Most confusable