ketone
/ˈkiːtəʊn/
"ketone" is a 6-letter English headword indexed on PlainSpell.
The verdict
“ketone” is a moderately-common English word, ranked #44,884 in English word frequency and used as a noun.
- #44,884
- frequency rank, English
- 6
- letters
- 8
- tracked misspellings
- 7
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A homologous series of organic molecules whose functional group is an oxygen atom joined to a carbon atom—by a double bond—in a carbon-hydrogen based molecule.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | ketone |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈkiːtəʊn/ |
| Letters | 6 |
| Frequency rank | #44,884 |
| Misspellings tracked | 8 |
| Confusable pairs | 7 |
| Source | Wiktionary (kaikki.org) |
Where “ketone” sits in English frequency
Spelling & Dictionary Insight
The English entry for ketone is 6 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈkiːtəʊn/. Corpus data places it at rank #44,884 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "A homologous series of organic molecules whose functional group is an oxygen atom joined to a carbon atom—by a double bond—in a carbon-hydrogen based molecule.".
Our generated misspelling index lists 8 likely wrong-spelling variants for ketone, with forms such as "ektone", "keotne", and "ketnoe". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 7 confusable-pair relationships, "kettle", "keystone", "keto", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From German Keton, from Aketon (“acetone”), from French acétone (“acetone”). See acetone. The correct English form is ketone, spelled K-E-T-O-N-E.
Definition
- 1A homologous series of organic molecules whose functional group is an oxygen atom joined to a carbon atom—by a double bond—in a carbon-hydrogen based molecule.
Etymology
From German Keton, from Aketon (“acetone”), from French acétone (“acetone”). See acetone.
This word in other languages
Common misspellings
Also misspelled as: ektone,keotne,ketnoe,ketoen,ketonne,kettone,kketone,kteone
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of ketone - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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 “ketone”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is K-E-T-O-N-E - every other letter order is a misspelling in standard orthography.
- Say it as /ˈkiːtəʊn/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “kettle” - see the side-by-side comparison. ketone vs kettle
- Browse more English words and confusable pairs in the same reference. English words
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.