sacroiliac
/ˌsækɹoʊˈɪliˌæk/
"sacroiliac" is a 10-letter English headword indexed on PlainSpell.
The verdict
“sacroiliac” is uncommon English (frequency #97,517 among 6,566 “S” headwords), classed as an adjective. The kind of spelling people second-guess.
- #97,517
- frequency rank, English
- 6,566
- “S” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Relating to the sacrum and ilium, or to the region of the lower back where they are located.
Corpus desk
Index EN-sacroiliac · sacroiliac · English
sacroiliac · rank #97,517 · 0 variants · 0 confusables
- FREQ-RARE #97,517
- LEN-MEGA 10 letters
- VOW-5 5 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH Sakuma
Nearest frequency peer: Sakuma (+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 “sacroiliac”
Sparse band: bars invert rank so rarer forms read shorter
- ruiner
ruiner
2,489 corpus weight
- sacroiliac
sacroiliac
2,484 corpus weight
- Sakuma
Sakuma
2,483 corpus weight
- salvator
salvator
2,482 corpus weight
- Savarkar
Savarkar
2,478 corpus weight
- sayeth
sayeth
2,476 corpus weight
What this shows Long-tail view: where “sacroiliac” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | sacroiliac |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˌsækɹoʊˈɪliˌæk/ |
| Letters | 10 |
| Frequency rank | #97,517 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “sacroiliac” in English
Rare enough to double-check
sacroiliac is uncommon English at frequency #97,517 among 6,566 “S” headwords, classed as anadjective, transcribed /ˌsækɹoʊˈɪliˌæk/. Rarity is why readers land here mid-draft. Gloss: "Relating to the sacrum and ilium, or to the region of the lower back where they are located.".
Our edit-distance generator produced no likely misspellings for sacroiliac, a straightforward case of a spelling with little room for common typos. It is not paired with a close-neighbour confusable in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From sacro- + iliac. The correct English form is sacroiliac, spelled S-A-C-R-O-I-L-I-A-C.
Definition
- 1Relating to the sacrum and ilium, or to the region of the lower back where they are located.
Etymology
From sacro- + iliac.
Synonyms
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "sacroiliac", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 10 letters (nearest by frequency rank).