Which to use
“Filter” is a noun and “fitter” is an adjective - they look or sound alike but fill different roles in a sentence.
- #5,945
- “Filter” frequency rank
- #41,167
- “fitter” frequency rank
- 47112
- confusion score
Side-by-Side Comparison
| Feature | Filter | fitter |
|---|---|---|
| Definition | Material zur Trennung oder Aussonderung bestimmter Substanzen | Nominativ Singular Maskulinum der starken Deklination des Positivs des Adjektivs fit |
Where the eye mixes Filter and fitter
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Why the eye confuses Filter with fitter
These two trip readers on the page rather than in the ear: Filter is [ˈfɪltɐ] while fitter is [ˈfɪtɐ]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - l in “Filter” becomes t in “fitter”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 47112, derived from the frequency rank of both members and their visual similarity.
Filter is recorded at frequency rank #5,945, classified as anoun, pronounced [ˈfɪltɐ]. fitter is at rank #41,167, tagged as anadj, pronounced [ˈfɪtɐ].
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 47112, this pair ranks #1,295,764 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of Filter vs fitter
Shared letters: efirt. Private to "Filter": l. Private to "fitter": -.
"Filter" · 6 letters · shape CVCCVC · "fitter" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "Filter" for "fitter" ever safe?
Which is more common, "Filter" or "fitter"?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "Filter" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fitter" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,295,764 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "Filter" and "fitter" also get mixed up with nearby pairs, the highest-scored neighbour is "fitter vs fixer". 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 #1,295,764 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.