diphosphate
"diphosphate" is a 11-letter English headword indexed on PlainSpell.
The verdict
“diphosphate” is uncommon English (frequency #83,187 among 26,416 “D” headwords), classed as a noun. The kind of spelling people second-guess.
- #83,187
- frequency rank, English
- 26,416
- “D” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - any salt or ester containing two phosphate groups
| Property | Value |
|---|---|
| Headword | diphosphate |
| Language | English |
| Part of speech | Noun |
| Letters | 11 |
| Frequency rank | #83,187 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “diphosphate” sits in English frequency
Rare enough to double-check
diphosphate is uncommon English at frequency #83,187 among 26,416 “D” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
diphosphate has no tracked misspelling variants, typically a sign the spelling maps closely to how the word sounds. This entry stands alone in our confusable dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From di- + phosphate. The correct English form is diphosphate, spelled D-I-P-H-O-S-P-H-A-T-E.
Definition
- 1any salt or ester containing two phosphate groups
- 2any salt or ester of diphosphoric acid; pyrophosphate
Etymology
From di- + phosphate.
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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Using “diphosphate”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is D-I-P-H-O-S-P-H-A-T-E - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this rank
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.