reliability
noun
reliability is spelled R-E-L-I-A-B-I-L-I-T-Y. The wrong spelling people search most is reliablity: about 50 Bing searches a month in the United States (September 2025 to August 2026), about 1 in 41 of all searches for the word. Reliability is a noun meaning “The quality of being reliable, dependable, or trustworthy”. The plural of reliability is reliabilities.
How many letters and syllables are in reliability?
| Letters | 11: R-E-L-I-A-B-I-L-I-T-Y |
|---|---|
| Syllables | 6 (from its American pronunciation) |
| In writing | 8.3 times per million words; the 8,036th most frequent word form |
| Wrong spellings searched | 1; the most searched, reliablity, about 50 Bing searches a month (all of them) |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you spell reliability?
Reliability is spelled R-E-L-I-A-B-I-L-I-T-Y. One wrong spelling is searched or written often enough to measure; together they are about 1 in 41 of the searches for reliability in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
How common is reliability?
Reliability appears 8.3 times per million words in written English, the 8,036th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce reliability?
Reliability has 6 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-reliability.wav, Wikimedia Commons (author and licence on each file's page).
Forms of reliability
- reliabilities plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does reliability mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The quality of being reliable, dependable, or trustworthy.
- 2
the ability to measure the same thing consistently (of a measurement indicating the degree to which the measure is consistent); that is, repeated measurements would give the same result (See also validity).
- 3
measurable time of work before failure
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Reliability in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | fiabilité |
| German | Zuverlässigkeit , Belastbarkeit |
| Portuguese | confiabilidade , fiabilidade |
| Spanish | fiabilidad |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does reliability come from?
From reliable + -ity.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).