complexityvscomplicityWhich spelling fits?

Which to use

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

#6,883
“complexity” frequency rank
#27,778
“complicity” frequency rank
34661
confusion score

Side-by-Side Comparison

Feature complexity complicity
Definition The state of being complex; intricacy; entanglement. The state of being complicit; involvement as a partner or accomplice, especially in a crime or other wrongdoing.

Letter map: complexity vs complicity

Shared letters muted; letters that set complexity and complicity apart highlighted. Shared run: 8.

10 ch
complexity
10 ch
complicity

Spelling & dictionary notes on complexity vs complicity

complexity and complicity are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 34661, derived from the frequency rank of both members and their visual similarity.

complexity is recorded at frequency rank #6,883, classified as anoun, pronounced /kəmˈplɛk.sɪ.ti/. complicity is at rank #27,778, tagged as anoun.

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 34661, this pair ranks #318,854 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of complexity vs complicity

Shared letters: cilmopty. Private to "complexity": ex. Private to "complicity": -.

"complexity" · 10 letters · shape CVCCCVCVCV  ·  "complicity" · 10 letters · shape CVCCCVCVCV

Known mistypes of this pair

  • complexityccomplexity · cmoplexity · comlpexity · commplexity · compelxity · compleixty · complexitty · complexityy
  • complicityccomplicity · cmoplicity · comlpicity · commplicity · compilcity · complciity · compliccity · complicitty

Frequently Asked Questions

Is swapping "complexity" for "complicity" ever safe?
No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
Which is more common, "complexity" or "complicity"?
"complexity" is the more common of the two: it sits at frequency rank #6,883 in our English list, against #27,778 for "complicity". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "complexity" and "complicity". Here's where to go from here.

  • Full dictionary entry for "complexity" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "complicity" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #318,854 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "complexity" and "complicity" also get mixed up with nearby pairs, the highest-scored neighbour is "complicit vs complicity". 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 #318,854 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