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 |
Letter map: stiffer vs stiller
Shared letters muted; letters that set stiffer and stiller apart highlighted. Shared run: 5. stiffer and stiller follow the identical consonant-vowel pattern (CCVCCVC). Same shape at a glance is often the real trap, independent of shared letters.
Grammar separator: stiffer vs stiller
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
Frequently Asked Questions
Do "stiffer" and "stiller" mean the same thing in a sentence?
In ordinary English text, does "stiffer" or "stiller" show up more?
After this comparison
Pair "stiffer" vs "stiller" is on the table, pick a follow-up below.
- Full dictionary entry for "stiffer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "stiller" - compare definitions side by side with the headword page. Word entry
- This pair ranks #22,499 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "stiffer" and "stiller" also get mixed up with nearby pairs, the highest-scored neighbour is "stiller vs stilted". 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 #22,499 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.