petrology
/pɪˈtɹɒl.ə.d͡ʒi/
"petrology" is a 9-letter English headword indexed on PlainSpell.
The verdict
“petrology” is uncommon English (frequency #82,658 among 4,417 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #82,658
- frequency rank, English
- 4,417
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The study of the origin, composition and structure of rock.
Corpus desk
Index EN-petrology · petrology · English
petrology · rank #82,658 · 0 variants · 0 confusables
- FREQ-RARE #82,658
- LEN-LONG 9 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,417
- PHOTO-FINISH pharmacopoeia
Nearest frequency peer: pharmacopoeia (+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 “petrology”
Sparse band: bars invert rank so rarer forms read shorter
- perfumer
perfumer
17,346 corpus weight
- Perryville
Perryville
17,345 corpus weight
- petrology
petrology
17,343 corpus weight
- pharmacopoe…
pharmacopoeia
17,342 corpus weight
- Phillis
Phillis
17,339 corpus weight
- phonebook
phonebook
17,338 corpus weight
What this shows Long-tail view: where “petrology” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | petrology |
| Language | English |
| Part of speech | Noun |
| IPA | /pɪˈtɹɒl.ə.d͡ʒi/ |
| Letters | 9 |
| Frequency rank | #82,658 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “petrology” in English
Rare enough to double-check
petrology is uncommon English at frequency #82,658 among 4,417 “P” headwords, classed as anoun, transcribed /pɪˈtɹɒl.ə.d͡ʒi/. Rarity is why readers land here mid-draft. Gloss: "The study of the origin, composition and structure of rock.".
No misspelling variants are generated for petrology in our index, a sign its spelling follows regular English conventions. No close-neighbour confusable shows up for this headword in our dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: From petro- + -logy. The correct English form is petrology, spelled P-E-T-R-O-L-O-G-Y.
Definition
- 1The study of the origin, composition and structure of rock.
Etymology
From petro- + -logy.
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); 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 "petrology", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).