inadequacy
/ɪˈnædɪkwəsi/
"inadequacy" is a 10-letter English headword indexed on PlainSpell.
The verdict
“inadequacy” is a moderately-common English word, ranked #37,508 in English word frequency and used as a noun.
- #37,508
- frequency rank, English
- 10
- letters
- 14
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The state of being inadequate.
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 | inadequacy |
| Language | English |
| Part of speech | Noun |
| IPA | /ɪˈnædɪkwəsi/ |
| Letters | 10 |
| Frequency rank | #37,508 |
| Misspellings tracked | 14 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “inadequacy” sits in English frequency
Spelling & Dictionary Insight
The English entry for inadequacy is 10 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ɪˈnædɪkwəsi/. Corpus data places it at rank #37,508 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 14 likely wrong-spelling variants for inadequacy, with forms such as "iandequacy", "inaddequacy", and "inadeqaucy". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 1 confusable-pair relationship, "inadequate", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From inadequate + -cy or in- + adequacy. The correct English form is inadequacy, spelled I-N-A-D-E-Q-U-A-C-Y.
Definition
- 1The state of being inadequate.
- 2A shortage of required material.
- 3A lack of competence or ability.
Etymology
From inadequate + -cy or in- + adequacy.
This word in other languages
Common misspellings
Also misspelled as: iandequacy,inaddequacy,inadeqaucy,inadeqquacy,inadequaccy,inadequacyy,inadequayc,inadequcay,inadeuqacy,inadqeuacy,inaedquacy,indaequacy,innadequacy,niadequacy
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of inadequacy - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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 "inadequacy"?
What does "inadequacy" mean?
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Using “inadequacy”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-A-D-E-Q-U-A-C-Y - every other letter order is a misspelling in standard orthography.
- Say it as /ɪˈnædɪkwəsi/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “inadequate” - see the side-by-side comparison. inadequacy vs inadequate
- 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.