compilationvscompletionTell them apart

Which to use

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

#8,912
“compilation” frequency rank
#4,932
“completion” frequency rank
13844
confusion score

Side-by-Side Comparison

Feature compilation completion
Definition The act or process of compiling or gathering together from various sources. The act or state of being or making something complete; conclusion, accomplishment.

Where the eye mixes compilation and completion

Muted = shared; highlighted = the visual trap. They share 9 letters in sequence.

11 ch
compilation
10 ch
completion

Why the eye confuses compilation with completion

A purely visual mix-up. compilation (/ˌkɒm.pɪˈleɪ.ʃən/) and completion (/kəmˈpliːʃən/) 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 13844, derived from the frequency rank of both members and their visual similarity.

compilation is recorded at frequency rank #8,912, classified as anoun, pronounced /ˌkɒm.pɪˈleɪ.ʃən/. completion is at rank #4,932, tagged as anoun, pronounced /kəmˈpliːʃən/.

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 13844, this pair ranks #473,533 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of compilation vs completion

Shared letters: cilmnopt. Private to "compilation": a. Private to "completion": e.

"compilation" · 11 letters · shape CVCCVCVCVVC  ·  "completion" · 10 letters · shape CVCCCVCVVC

Known mistypes of this pair

  • compilationccompilation · cmopilation · comiplation · commpilation · compialtion · compilaiton · compilasion · compilatino
  • completionccompletion · cmopletion · comlpetion · commpletion · compeltion · compleiton · complesion · completino

Frequently Asked Questions

Do "compilation" and "completion" mean the same thing in a sentence?
No. They are said differently (/ˌkɒm.pɪˈleɪ.ʃən/ versus /kəmˈpliːʃən/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary English text, does "compilation" or "completion" show up more?
"completion" is the more common of the two: it sits at frequency rank #4,932 in our English list, against #8,912 for "compilation". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "compilation" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "completion" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #473,533 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "compilation" and "completion" also get mixed up with nearby pairs, the highest-scored neighbour is "compilation vs complication". 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 #473,533 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