uninterruptible power supply
Detailed reference entry for the English word "uninterruptible-power-supply", 28-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Wiktionary, and usage frequency ranked against an open word-frequency list covering the top 100,000 English words. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "uninterruptible-power-supply" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "uninterruptible-power-supply" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.
The verdict
“uninterruptible power supply” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 28
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) — A device or system that almost instantaneously provides emergency power in the case that main power fails.
Compare similar words
See how uninterruptible power supply compares against similar English words.
Browse all word comparisons →| Property | Value |
|---|---|
| Headword | uninterruptible power supply |
| Language | English |
| Part of speech | Noun |
| Letters | 28 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “uninterruptible power supply” sits in English frequency
Spelling & Dictionary Insight
The English entry for uninterruptible power supply is 28 letters long, classified as a noun. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "A device or system that almost instantaneously provides emergency power in the case that main power fails.".
No misspelling variants are generated for uninterruptible power supply in our index, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.
No explicit etymology string is stored for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is uninterruptible power supply, spelled U-N-I-N-T-E-R-R-U-P-T-I-B-L-E- -P-O-W-E-R- -S-U-P-P-L-Y, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.
Definition
- 1A device or system that almost instantaneously provides emergency power in the case that main power fails.
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). See the methodology for how each field is sourced and updated.
Cite this page
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PlainSpell, “uninterruptible power supply, English word data” (May 6, 2026). Derived from Wiktionary (kaikki.org, CC BY-SA) and an open word-frequency list. https://plainspell.com/en/word/uninterruptible-power-supply
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Using “uninterruptible power supply”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is U-N-I-N-T-E-R-R-U-P-T-I-B-L-E- -P-O-W-E-R- -S-U-P-P-L-Y - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Nearby English words
Other entries that begin with the letter U in our English index: