capacitorvscapacityWhich spelling fits?

Which to use

“capacitor” and “capacity” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#23,192
“capacitor” frequency rank
#1,988
“capacity” frequency rank
25180
confusion score

Side-by-Side Comparison

Feature capacitor capacity
Definition An electronic component capable of storing electrical energy in an electric field; especially one consisting of two conductors separated by a dielectric. The ability to hold, receive, or absorb.

Where the eye mixes capacitor and capacity

Muted = shared; highlighted = the visual trap. They share 7 letters in sequence.

9 ch
capacitor
8 ch
capacity

Why the eye confuses capacitor with capacity

A purely visual mix-up. capacitor (/kəˈpæ.sɪ.tə/) and capacity (/kəˈpæ.sɪ.ti/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 25180, derived from the frequency rank of both members and their visual similarity.

capacitor is recorded at frequency rank #23,192, classified as anoun, pronounced /kəˈpæ.sɪ.tə/. capacity is at rank #1,988, tagged as anoun, pronounced /kəˈpæ.sɪ.ti/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 25180, this pair ranks #396,303 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of capacitor vs capacity

Shared letters: acipt. Private to "capacitor": or. Private to "capacity": y.

"capacitor" · 9 letters · shape CVCVCVCVC  ·  "capacity" · 8 letters · shape CVCVCVCV

Known mistypes of this pair

  • capacitoracpacitor · caapcitor · capaccitor · capaciotr · capacitorr · capacitro · capacittor · capactior
  • capacityacpacity · caapcity · capaccity · capacitty · capacityy · capaciyt · capactiy · capaicty

Frequently Asked Questions

Can "capacitor" and "capacity" be used interchangeably?
No. They are said differently (/kəˈpæ.sɪ.tə/ versus /kəˈpæ.sɪ.ti/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary English text, does "capacitor" or "capacity" show up more?
"capacity" is the more common of the two: it sits at frequency rank #1,988 in our English list, against #23,192 for "capacitor". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "capacitor" and "capacity" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "capacitor" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "capacity" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #396,303 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "capacitor" and "capacity" also get mixed up with nearby pairs, the highest-scored neighbour is "calamity vs capacity". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #396,303 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list