quintillion
/kwɪnˈtɪljən/
"quintillion" is a 11-letter English headword indexed on PlainSpell.
The verdict
“quintillion” is uncommon English (outside the top frequency list), classed as a numeral. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 11
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Either of two very large amounts:
Corpus desk
Index EN-quintillion · quintillion · English
quintillion · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 11 letters
- VOW-5 5 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "Q" thin
- PHOTO-UNK Peer pending
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.
| Property | Value |
|---|---|
| Headword | quintillion |
| Language | English |
| Part of speech | Numeral |
| IPA | /kwɪnˈtɪljən/ |
| Letters | 11 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “quintillion” in English
Rare enough to double-check
quintillion is uncommon English outside the top frequency list, classed as anumeral, transcribed /kwɪnˈtɪljən/. Rarity is why readers land here mid-draft. 3 senses are on record.
We couldn't generate a plausible misspelling set for quintillion, suggesting the orthography follows predictable English patterns. This entry stands alone in our confusable dataset, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: From French quintillion. By surface analysis, quint- (“five”) + -illion. The correct English form is quintillion, spelled Q-U-I-N-T-I-L-L-I-O-N.
Definition
- 1Either of two very large amounts:
- 2Either of two very large amounts:
- 3An unspecified very large number.
Recorded use
Wiktionary examplesThese source excerpts show how quintillion appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Last week, we used[…]the BBC News website's biggest number: 9,223,372,036,854,775,808, that's 9.2 quintillion[…][the maximum video viewer count on YouTube's] updated counter software.
“I’m not sure I understand why we have to send a quadrillion-credit mission to another galaxy.” He looked fleetingly amused. “Quintillion... and we don’t have a choice, Harper. Any of us, really, but humanity especially.”
Etymology
From French quintillion. By surface analysis, quint- (“five”) + -illion.
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.