bolusvsbusWhat's the difference?

Which to use

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

#46,942
“bolus” frequency rank
#1,554
“bus” frequency rank
48496
confusion score

Side-by-Side Comparison

Feature bolus bus
Definition A round mass of something, especially of chewed food in the mouth or alimentary canal. A motor vehicle for transporting large numbers of people along roads.

Where the eye mixes bolus and bus

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. bolus runs 5 letters (CVCVC) against bus's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.

5 ch
bolus
3 ch
bus

Why the eye confuses bolus with bus

A purely visual mix-up. bolus (/ˈbəʊləs/) and bus (/bʌs/) 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 2 letter(s) in length. Our composite confusion score for this pair is 48496, derived from the frequency rank of both members and their visual similarity.

bolus is recorded at frequency rank #46,942, classified as anoun, pronounced /ˈbəʊləs/. bus is at rank #1,554, tagged as anoun, pronounced /bʌs/.

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 48496, this pair ranks #192,541 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of bolus vs bus

Shared letters: bsu. Private to "bolus": lo. Private to "bus": -.

"bolus" · 5 letters · shape CVCVC  ·  "bus" · 3 letters · shape CVC

Known mistypes of this pair

  • bolus ← bbolus · blous · bollus · bolsu · boluss · bouls · oblus

Frequently Asked Questions

Is swapping "bolus" for "bus" ever safe?
No. They are said differently (/ˈbəʊləs/ versus /bʌs/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "bolus" or "bus"?
"bus" is the more common of the two: it sits at frequency rank #1,554 in our English list, against #46,942 for "bolus". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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

  • Full dictionary entry for "bolus" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "bus" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #192,541 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "bolus" and "bus" also get mixed up with nearby pairs, the highest-scored neighbour is "bodes vs bolus". 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 #192,541 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