simultaneously
/ˌsaɪmlˈteɪnɪəsli/adverb
simultaneously is spelled S-I-M-U-L-T-A-N-E-O-U-S-L-Y. The wrong spelling people search most is simultanously: about 40 Bing searches a month in the United States (September 2025 to August 2026), about 1 in 169 of all searches for the word. Simultaneously is an adverb meaning “Occurring at the same time”.
How many letters and syllables are in simultaneously?
| Letters | 14: S-I-M-U-L-T-A-N-E-O-U-S-L-Y |
|---|---|
| Syllables | 6 (from its American pronunciation) |
| In writing | 15 times per million words; the 5,407th most frequent word form |
| Wrong spellings searched | 1; the most searched, simultanously, about 40 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 simultaneously?
Simultaneously is spelled S-I-M-U-L-T-A-N-E-O-U-S-L-Y. One wrong spelling is searched or written often enough to measure; together they are about 1 in 168 of the searches for simultaneously 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 simultaneously?
Simultaneously appears 15 times per million words in written English, the 5,407th 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 simultaneously?
- UK /ˌsɪmlˈteɪnɪəsli/
- US /ˌsaɪmlˈteɪnɪəsli/
Simultaneously 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-simultaneously.wav, Wikimedia Commons (author and licence on each file's page).
What does simultaneously mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adverb
- 1
Occurring at the same time.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Simultaneously in Spanish, French, German and Portuguese
In the sense occurring at the same time:
| Language | Words |
|---|---|
| French | simultanément, en même temps |
| German | gleichzeitig |
| Portuguese | simultaneamente |
| Spanish | simultáneamente |
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 simultaneously come from?
From simultaneous + -ly.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).