K2
/keɪˈtuː/
"k2" is a 1-letter English headword indexed on PlainSpell.
The verdict
“K2” is a moderately-common English word, ranked #25,110 in English word frequency and used as a proper noun.
- #25,110
- frequency rank, English
- 2
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A mountain on the border between Pakistan and Taxkorgan, Kashgar prefecture, Xinjiang, China, the world’s second highest mountain, located in the Ladakh Karakorams.
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 | K2 |
| Language | English |
| Part of speech | Proper noun |
| IPA | /keɪˈtuː/ |
| Letters | 2 |
| Frequency rank | #25,110 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “K2” sits in English frequency
Spelling & Dictionary Insight
The English entry for K2 is 2 letters long, classified as a proper noun, and transcribed in the International Phonetic Alphabet as /keɪˈtuː/. Corpus data places it at rank #25,110 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "A mountain on the border between Pakistan and Taxkorgan, Kashgar prefecture, Xinjiang, China, the world’s second highest mountain, located in the Ladakh Karakorams.".
No misspelling variants are generated for K2 in our index, a sign its spelling follows regular English conventions. It also participates in 20 confusable-pair relationships, "kI", "ka", "ky", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: Designated by Thomas Montgomerie in 1856 during the Great Trigonometrical Survey of British India, for being the second of the two most prominent peaks in the Karakoram range visible to him from Mount Harmukh. The correct English form is K2, spelled K-2.
Definition
- 1A mountain on the border between Pakistan and Taxkorgan, Kashgar prefecture, Xinjiang, China, the world’s second highest mountain, located in the Ladakh Karakorams.
Etymology
Designated by Thomas Montgomerie in 1856 during the Great Trigonometrical Survey of British India, for being the second of the two most prominent peaks in the Karakoram range visible to him from Mount Harmukh.
Synonyms
This word in other languages
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 “K2”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is K-2 - every other letter order is a misspelling in standard orthography.
- Say it as /keɪˈtuː/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “kI” - see the side-by-side comparison. K2 vs kI
- 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.