regio
"regio" is a 5-letter English headword indexed on PlainSpell.
The verdict
“regio” is uncommon English (frequency #84,673 among 3,094 “R” headwords), classed as a noun. The kind of spelling people second-guess.
- #84,673
- frequency rank, English
- 3,094
- “R” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any large area of a planet or moon that is strongly differentiated from neighbouring areas by colour or albedo.
Corpus desk
Index EN-regio · regio · English
regio · rank #84,673 · 0 variants · 0 confusables
- FREQ-RARE #84,673
- LEN-MID 5 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,094
- PHOTO-FINISH refracting
Nearest frequency peer: refracting (-1 rank slots)
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.
Long-tail ranks near “regio”
Sparse band: bars invert rank so rarer forms read shorter
- reductionism
reductionism
15,333 corpus weight
- reentering
reentering
15,332 corpus weight
- reestablish…
reestablishment
15,331 corpus weight
- refracting
refracting
15,329 corpus weight
- regio
regio
15,328 corpus weight
- Renu
Renu
15,323 corpus weight
What this shows Long-tail view: where “regio” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | regio |
| Language | English |
| Part of speech | Noun |
| Letters | 5 |
| Frequency rank | #84,673 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “regio” in English
Rare enough to double-check
regio is uncommon English at frequency #84,673 among 3,094 “R” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
regio has no tracked misspelling variants, and the word's spelling is regular enough that our generator found nothing worth flagging. Our dataset records no confusable match here, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: Learned borrowing from Latin regiō. Doublet of region. The correct English form is regio, spelled R-E-G-I-O.
Definition
- 1Any large area of a planet or moon that is strongly differentiated from neighbouring areas by colour or albedo.
- 2A district of a city.
Recorded use
Wiktionary exampleThese source excerpts show how regio appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The British School has unearthed a city of continuous houses, more than 400 feet long by 350 broad, whose many blocks or "insul[ae]" might seem almost to need the more elaborate grouping of the "regiones" of Pompeii.
Etymology
Learned borrowing from Latin regiō. Doublet of region.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "regio"?
What does "regio" mean?
What is the origin of the word "regio"?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "regio", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 5 letters (nearest by frequency rank).