uptime

noun

By · According to Wiktionary data (CC BY-SA) ·

"uptime" is a 6-letter English headword indexed on PlainSpell.

The verdict

“uptime” has 8 generated spelling variants in the English index at frequency #38,221. The variants make it a useful spelling check.

#38,221
frequency rank, English
1,433
“U” headwords
8
tracked misspellings
5
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The period of time a computer has functioned since last requiring a reboot.

Corpus desk

Index EN-uptime · uptime · English

uptime · rank #38,221 · 8 variants · 5 confusables

  • FREQ-MID #38,221
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-MID 5 pairs
  • VAR-MID 8 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH unrequited

Nearest frequency peer: unrequited (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “uptime”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “uptime” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

uptime vs upside
67% similar
uptime vs uptake
67% similar
uptime vs uptick
67% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for uptime
PropertyValue
Headworduptime
LanguageEnglish
Part of speechNoun
Letters6
Frequency rank#38,221
Misspellings tracked8
Confusable pairs5
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “uptime”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).uptimelands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “unrequited” (#38,220), “urinal” (#38,222), “unease” (#38,218). Among 1,433 “U” headwords, “uptime” is #38,221. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 8 spelling variants around uptime, anoun. Corpus frequency is #38,221 among 1,433 “U” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 8 likely wrong-spelling variants for uptime, with forms such as "putime", "upitme", and "upptime". 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 5 confusable-pair relationships, "upside", "uptake", "uptick", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From up (“(computing) functional, working”, adjective) + time. The correct English form is uptime, spelled U-P-T-I-M-E.

Definition

  1. 1
    The period of time a computer has functioned since last requiring a reboot.
  2. 2
    The amount of time, or the proportion of total time, during which some system or machinery is operable.

Recorded use

Wiktionary example

These source excerpts show how uptime appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. To achieve uptime optimization, the machinery specification and actual design must be right.

Etymology

From up (“(computing) functional, working”, adjective) + time.

Antonyms

downtime

Common misspellings

Also misspelled as:

  • putime
  • upitme
  • upptime
  • uptiem
  • uptimme
  • uptmie
  • upttime
  • utpime

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of uptime - 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.

putime2upitme2upptime1uptiem2uptimme1uptmie2upttime1utpime2
Edit distance from "uptime"

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

How do you spell "uptime"?
"uptime" is spelled U-P-T-I-M-E.
What does "uptime" mean?
As a noun, "uptime" means: The period of time a computer has functioned since last requiring a reboot.
What words are commonly confused with "uptime"?
"uptime" is commonly confused with "upside", "uptake", "uptick". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "uptime"?
From up (“(computing) functional, working”, adjective) + time. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "uptime", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 6 letters (nearest by frequency rank).

urinal#38,222unease#38,218visage#38,235WeChat#38,239

Similar misspelling depth

Headwords with a similar count of attested misspellings (8 here; floor ≥5).

Trudy8 variantsAlsace8 variantsangina8 variantsSearle8 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list