calcium
/ˈkælsi.əm/
"calcium" is a 7-letter English headword indexed on PlainSpell.
The verdict
“calcium” has 10 generated spelling variants in the English index at frequency #9,291. The variants make it a useful spelling check.
- #9,291
- frequency rank, English
- 5,599
- “C” headwords
- 10
- tracked misspellings
- 4
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The chemical element with atomic number 20: a soft, silvery-white alkaline earth metal which occurs naturally as carbonate in limestone and as silicate in many rocks.
Corpus desk
Index EN-calcium · calcium · English
calcium · rank #9,291 · 10 variants · 4 confusables
- FREQ-COMMON #9,291
- LEN-LONG 7 letters
- VOW-3 3 vowels
- CONFUS-MID 4 pairs
- VAR-MID 10 variants
- BOOK-DENSE 5,599
- PHOTO-FINISH broadly
Nearest frequency peer: broadly (-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.
Rank peers near misspelling magnet “calcium”
Same rarity band: useful when a typo lands on a peer headword
- bibliography
bibliography
90,713 corpus weight
- bot
bot
90,712 corpus weight
- broadly
broadly
90,711 corpus weight
- calcium
calcium
90,710 corpus weight
- Calvin
Calvin
90,709 corpus weight
- candles
candles
90,708 corpus weight
What this shows “calcium” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | calcium |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈkælsi.əm/ |
| Letters | 7 |
| Frequency rank | #9,291 |
| Misspellings tracked | 10 |
| Confusable pairs | 4 |
| Source | Wiktionary (kaikki.org) |
Frequency seat of misspelling magnet “calcium”
A misspelling magnet
The generator records 10 spelling variants around calcium (IPA /ˈkælsi.əm/), anoun. Corpus frequency is #9,291 among 5,599 “C” headwords. Wiktionary lists 2 senses, so context still picks the gloss.
Our generated misspelling index lists 10 likely wrong-spelling variants for calcium, with forms such as "aclcium", "caclium", and "calccium". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 4 confusable-pair relationships, "Calum", "Callum", "cadmium", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: Coined by British chemist Humphry Davy in 1808, from Latin calx (“lime, limestone”) because it occurs in limestone. By surface analysis, calc- + -ium. The correct English form is calcium, spelled C-A-L-C-I-U-M.
Definition
- 1The chemical element with atomic number 20: a soft, silvery-white alkaline earth metal which occurs naturally as carbonate in limestone and as silicate in many rocks.
- 2An atom of this element.
Recorded use
Wiktionary examplesThese source excerpts show how calcium appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.
“This material has a specific hardness and is chemically very stable. It forms naturally from calcium alone, but bacteria accelerate the transformation into calcium carbonate,” explains Alejandro Montesinos, head of the Decarbonization, Climate Change, and Circular Economy Research Group at Tec de Monterrey and a member of the Institute of Advanced Materi…
Etymology
Coined by British chemist Humphry Davy in 1808, from Latin calx (“lime, limestone”) because it occurs in limestone. By surface analysis, calc- + -ium.
This word in other languages
Common misspellings
Also misspelled as:
- aclcium
- caclium
- calccium
- calcimu
- calciumm
- calcuim
- calicum
- callcium
- ccalcium
- clacium
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of calcium - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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 "calcium", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 7 letters (nearest by frequency rank).
Similar misspelling depth
Headwords with a similar count of attested misspellings (10 here; floor ≥5).