locksvslocumConfusable pair

Which to use

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

#7,810
“locks” frequency rank
#47,732
“locum” frequency rank
55542
confusion score

Side-by-Side Comparison

Feature locks locum
Definition plural of lock Ellipsis of locum tenens.

Where the eye mixes locks and locum

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
locks
5 ch
locum

Look-alike desk: locks vs locum

A purely visual mix-up. locks (/lɒks/) and locum (/ˈləʊkəm/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 55542, derived from the frequency rank of both members and their visual similarity.

locks is recorded at frequency rank #7,810, classified as anoun, pronounced /lɒks/. locum is at rank #47,732, tagged as anoun, pronounced /ˈləʊkəm/.

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 55542, this pair ranks #132,843 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of locks vs locum

Shared letters: clo. Private to "locks": ks. Private to "locum": mu.

"locks" · 5 letters · shape CVCCC  ·  "locum" · 5 letters · shape CVCVC

Known mistypes of this pair

  • lockslcoks · llocks · loccks · lockks · lockss · locsk · lokcs · olcks
  • locumlcoum · llocum · loccum · locmu · locumm · loucm · olcum

Frequently Asked Questions

Can "locks" and "locum" be used interchangeably?
No. They are said differently (/lɒks/ versus /ˈləʊkəm/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "locks" or "locum"?
"locks" is the more common of the two: it sits at frequency rank #7,810 in our English list, against #47,732 for "locum". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "locks" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "locum" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #132,843 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "locks" and "locum" also get mixed up with nearby pairs, the highest-scored neighbour is "lockup vs locum". 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 #132,843 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