infectivity
"infectivity" is a 11-letter English headword indexed on PlainSpell.
The verdict
“infectivity” is uncommon English (frequency #93,829 among 2,140 “I” headwords), classed as a noun. The kind of spelling people second-guess.
- #93,829
- frequency rank, English
- 2,140
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The ability of a pathogen to establish an infection
Corpus desk
Index EN-infectivity · infectivity · English
infectivity · rank #93,829 · 0 variants · 0 confusables
- FREQ-RARE #93,829
- LEN-MEGA 11 letters
- VOW-5 5 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH indicia
Nearest frequency peer: indicia (-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 “infectivity”
Sparse band: bars invert rank so rarer forms read shorter
- immunoassay
immunoassay
6,177 corpus weight
- immunogenic…
immunogenicity
6,176 corpus weight
- indicia
indicia
6,173 corpus weight
- infectivity
infectivity
6,172 corpus weight
- infringer
infringer
6,171 corpus weight
- intermezzo
intermezzo
6,169 corpus weight
What this shows Long-tail view: where “infectivity” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | infectivity |
| Language | English |
| Part of speech | Noun |
| Letters | 11 |
| Frequency rank | #93,829 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “infectivity” in English
Rare enough to double-check
infectivity is uncommon English at frequency #93,829 among 2,140 “I” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "The ability of a pathogen to establish an infection".
No generated misspelling entries exist for infectivity in our index, since its letter sequence doesn't invite the usual edit-distance slips. No close-neighbour confusable shows up for this headword in our dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From infective + -ity. The correct English form is infectivity, spelled I-N-F-E-C-T-I-V-I-T-Y.
Definition
- 1The ability of a pathogen to establish an infection
Recorded use
Wiktionary exampleThese source excerpts show how infectivity appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The reputation for low infectivity of rubella was probably based on failure to recognise rashless cases.
Etymology
From infective + -ity.
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 "infectivity", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 11 letters (nearest by frequency rank).