kayser
"kayser" is a 6-letter English headword indexed on PlainSpell.
The verdict
“kayser” is uncommon English (frequency #78,748 among 9,255 “K” headwords), classed as a noun. The kind of spelling people second-guess.
- #78,748
- frequency rank, English
- 9,255
- “K” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A unit of wavenumber in the CGS system of units, equivalent to the number of waves in one centimeter.
| Property | Value |
|---|---|
| Headword | kayser |
| Language | English |
| Part of speech | Noun |
| Letters | 6 |
| Frequency rank | #78,748 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “kayser” sits in English frequency
Rare enough to double-check
kayser is uncommon English at frequency #78,748 among 9,255 “K” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A unit of wavenumber in the CGS system of units, equivalent to the number of waves in one centimeter.".
We couldn't generate a plausible misspelling set for kayser, since its letter pattern doesn't lend itself to common typo substitutions. We don't track a confusable pairing for this entry, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: Named after Heinrich Kayser. The correct English form is kayser, spelled K-A-Y-S-E-R.
Definition
- 1A unit of wavenumber in the CGS system of units, equivalent to the number of waves in one centimeter.
Etymology
Named after Heinrich Kayser.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “kayser”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is K-A-Y-S-E-R - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this rank
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.