5K
"5k" is a 1-letter English headword indexed on PlainSpell.
The verdict
“5K” is a moderately-common English word, ranked #13,083 in English word frequency and used as a noun.
- #13,083
- frequency rank, English
- 2
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A road race over 5 000 metres.
| Property | Value |
|---|---|
| Headword | 5K |
| Language | English |
| Part of speech | Noun |
| Letters | 2 |
| Frequency rank | #13,083 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “5K” sits in English frequency
Spelling & Dictionary Insight
The English entry for 5K is 2 letters long, classified as a noun. Corpus data places it at rank #13,083 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our edit-distance generator produced no likely misspellings for 5K, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From 5 (“the number five”) + K (“abbreviation for thousand”). The correct English form is 5K, spelled 5-K.
Definition
- 1A road race over 5 000 metres.
- 2A display device or item of content with approximately 5,000 pixels in the horizontal axis.
Etymology
From 5 (“the number five”) + K (“abbreviation for thousand”).
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 “5K”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is 5-K - every other letter order is a misspelling in standard orthography.
- 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.