optimum
/ˈɑptɪməm/noun, adjective
optimum is spelled O-P-T-I-M-U-M: 7 letters and 3 syllables. It appears 3.5 times per million words in written English, the 14,106th most frequent word form (wordfreq, 2021 data). People search “optimal vs optimum” about 1,300 times a month (Google, United States). As a noun, optimum means “The best or most favorable condition, or the greatest amount or degree possible under specific sets of comparable circumstances” (English Wiktionary, September 2026). The plural of optimum is optima or optimums.
How many letters and syllables are in optimum?
| Letters | 7: O-P-T-I-M-U-M |
|---|---|
| Syllables | 3 (from its American pronunciation) |
| In writing | 3.5 times per million words; the 14,106th most frequent word form |
| Wrong spellings searched | none measured in search |
| Pairs people search |
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 common is optimum?
Optimum appears 3.5 times per million words in written English, the 14,106th 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 optimum?
- US /ˈɑptɪməm/
- UK /ˈɒptɪməm/
Optimum has 3 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-optimum.wav, LL-Q1860_(eng)-Wodencafe-optimum.wav, Wikimedia Commons (author and licence on each file's page).
Words people confuse with optimum
Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).
Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).
Forms of optimum
- optima plural
- optimums plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does optimum mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The best or most favorable condition, or the greatest amount or degree possible under specific sets of comparable circumstances.
- 2
Any long period of time marked by a persistently warm climate; a climatic optimum.
adjective
- 1
The best or most advantageous; surpassing all others.
optimum conditions for climbing
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Optimum in Spanish, French, German and Portuguese
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 optimum come from?
From New Latin, neuter of Latin optimus (“best, very good”), from the root in ops (“work”) or omnis (“all”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).