siltstone
"siltstone" is a 9-letter English headword indexed on PlainSpell.
The verdict
“siltstone” is uncommon English (frequency #77,200 among 6,566 “S” headwords), classed as a noun. The kind of spelling people second-guess.
- #77,200
- frequency rank, English
- 6,566
- “S” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone.
Corpus desk
Index EN-siltstone · siltstone · English
siltstone · rank #77,200 · 0 variants · 0 confusables
- FREQ-RARE #77,200
- LEN-LONG 9 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH Silesian
Nearest frequency peer: Silesian (-2 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 “siltstone”
Sparse band: bars invert rank so rarer forms read shorter
- sigs
sigs
22,804 corpus weight
- Silesian
Silesian
22,803 corpus weight
- siltstone
siltstone
22,801 corpus weight
- slants
slants
22,798 corpus weight
- slavishly
slavishly
22,797 corpus weight
- SLD
SLD
22,796 corpus weight
What this shows Long-tail view: where “siltstone” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | siltstone |
| Language | English |
| Part of speech | Noun |
| Letters | 9 |
| Frequency rank | #77,200 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “siltstone” in English
Rare enough to double-check
siltstone is uncommon English at frequency #77,200 among 6,566 “S” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone.".
No generated misspelling entries exist for siltstone in our index, a straightforward case of a spelling with little room for common typos. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: From silt + stone. The correct English form is siltstone, spelled S-I-L-T-S-T-O-N-E.
Definition
- 1A sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone.
Etymology
From silt + stone.
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 "siltstone", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).