carboxyl
/kɑː(ɹ)ˈbɒksɪl/
"carboxyl" is a 8-letter English headword indexed on PlainSpell.
The verdict
“carboxyl” is uncommon English (frequency #77,506 among 5,599 “C” headwords), classed as a noun. The kind of spelling people second-guess.
- #77,506
- frequency rank, English
- 5,599
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A univalent functional group consisting of a carbonyl and a hydroxyl functional group (-CO.OH); characteristic of carboxylic acids.
Corpus desk
Index EN-carboxyl · carboxyl · English
carboxyl · rank #77,506 · 0 variants · 0 confusables
- FREQ-RARE #77,506
- LEN-LONG 8 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 5,599
- PHOTO-FINISH Carberry
Nearest frequency peer: Carberry (-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 “carboxyl”
Sparse band: bars invert rank so rarer forms read shorter
- Canavan
Canavan
22,499 corpus weight
- Carberry
Carberry
22,496 corpus weight
- carboxyl
carboxyl
22,495 corpus weight
- carex
carex
22,494 corpus weight
- Carnaby
Carnaby
22,493 corpus weight
- carnelian
carnelian
22,492 corpus weight
What this shows Long-tail view: where “carboxyl” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | carboxyl |
| Language | English |
| Part of speech | Noun |
| IPA | /kɑː(ɹ)ˈbɒksɪl/ |
| Letters | 8 |
| Frequency rank | #77,506 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “carboxyl” in English
Rare enough to double-check
carboxyl is uncommon English at frequency #77,506 among 5,599 “C” headwords, classed as anoun, transcribed /kɑː(ɹ)ˈbɒksɪl/. Rarity is why readers land here mid-draft. Gloss: "A univalent functional group consisting of a carbonyl and a hydroxyl functional group (-CO.OH); characteristic of carboxylic acids.".
The misspelling generator found no plausible variants for carboxyl, typically a sign the spelling maps closely to how the word sounds. Our dataset records no confusable match here, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: Blend of carbonyl + hydroxyl. The correct English form is carboxyl, spelled C-A-R-B-O-X-Y-L.
Definition
- 1A univalent functional group consisting of a carbonyl and a hydroxyl functional group (-CO.OH); characteristic of carboxylic acids.
Etymology
Blend of carbonyl + hydroxyl.
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 "carboxyl", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 8 letters (nearest by frequency rank).