reactivity
/rɪˈakˈtɪvɪti/
"reactivity" is a 10-letter English headword indexed on PlainSpell.
The verdict
“reactivity” is a moderately-common English word, ranked #33,387 in English word frequency and used as a noun.
- #33,387
- frequency rank, English
- 10
- letters
- 15
- tracked misspellings
- 2
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - responsiveness to stimulation
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 | reactivity |
| Language | English |
| Part of speech | Noun |
| IPA | /rɪˈakˈtɪvɪti/ |
| Letters | 10 |
| Frequency rank | #33,387 |
| Misspellings tracked | 15 |
| Confusable pairs | 2 |
| Source | Wiktionary (kaikki.org) |
Where “reactivity” sits in English frequency
Spelling & Dictionary Insight
The English entry for reactivity is 10 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /rɪˈakˈtɪvɪti/. Corpus data places it at rank #33,387 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 15 likely wrong-spelling variants for reactivity, with forms such as "eractivity", "raectivity", and "reacctivity". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 2 confusable-pair relationships, "relativity", "reactivate", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From reactive + -ity. The correct English form is reactivity, spelled R-E-A-C-T-I-V-I-T-Y.
Definition
- 1responsiveness to stimulation
- 2relative susceptibility to chemical reaction
Etymology
From reactive + -ity.
This word in other languages
Common misspellings
Also misspelled as: eractivity,raectivity,reacctivity,reacitvity,reactiivty,reactivitty,reactivityy,reactiviyt,reactivtiy,reactivvity,reacttivity,reactviity,reatcivity,recativity,rreactivity
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of reactivity - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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
How do you spell "reactivity"?
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Using “reactivity”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is R-E-A-C-T-I-V-I-T-Y - every other letter order is a misspelling in standard orthography.
- Say it as /rɪˈakˈtɪvɪti/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “relativity” - see the side-by-side comparison. reactivity vs relativity
- Browse more English words and confusable pairs in the same reference. English words
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.