nonillion
"nonillion" is a 9-letter English headword indexed on PlainSpell.
The verdict
“nonillion” is uncommon English (outside the top frequency list), classed as a numeral. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - 10³⁰.
Corpus desk
Index EN-nonillion · nonillion · English
nonillion · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 9 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "N" 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 | nonillion |
| Language | English |
| Part of speech | Numeral |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “nonillion” in English
Rare enough to double-check
nonillion is uncommon English outside the top frequency list, classed as anumeral. Rarity is why readers land here mid-draft. 2 senses are on record.
nonillion doesn't appear in our generated misspelling index, and the word's spelling is regular enough that our generator found nothing worth flagging. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From French nonillion. By surface analysis, non- (“nine”) + -illion. The correct English form is nonillion, spelled N-O-N-I-L-L-I-O-N.
Definition
- 110³⁰.
- 210⁵⁴.
Recorded use
Wiktionary examplesThese source excerpts show how nonillion appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
As we have seen that one nought goes to each potency, for the thirtieth potency we will have for the denominator one followed by thirty noughts; or the original drop of drug in one nonillion drops of alcohol!
Do ya not be knowin' that there are 10 nonillion atoms within the likes of us?
Etymology
From French nonillion. By surface analysis, non- (“nine”) + -illion.
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.