com vs cum, What's the Difference?

Which to use

“com” and “cum” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#14
“com” frequency rank: #29,299
“cum” frequency rank: 29313
confusion score

Side-by-Side Comparison

Feature	com	cum
Definition	indica várias relações: companhia, causa, instrumento, ligação, modo, oposição	usado para indicar algo com duas funções, ou então que tenha se modificado de uma coisa para outra:

Where the eye mixes com and cum

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch

com

3 ch

cum

Why the eye confuses com with cum

A purely visual mix-up. com (/kõ/) and cum (/kʌm/) 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 a single letter - o in “com” becomes u in “cum”. Our composite confusion score for this pair is 29313, derived from the frequency rank of both members and their visual similarity.

com is recorded at frequency rank #14, classified as aprep, pronounced /kõ/. cum is at rank #29,299, tagged as aprep, pronounced /kʌm/.

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 29313, this pair ranks #39,366 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of com vs cum

Shared letters: cm. Private to "com": o. Private to "cum": u.

"com" · 3 letters · shape CVC · "cum" · 3 letters · shape CVC

Frequently Asked Questions

Do "com" and "cum" mean the same thing in a sentence?

No. They are said differently (/kõ/ versus /kʌm/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

In ordinary Portuguese text, does "com" or "cum" show up more?

"com" is the more common of the two: it sits at frequency rank #14 in our Portuguese list, against #29,299 for "cum". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

Full dictionary entry for "com" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "cum" - compare definitions side by side with the headword page. Word entry
This pair ranks #39,366 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"com" and "cum" also get mixed up with nearby pairs, the highest-scored neighbour is "cham vs cum". Nearby pair

Confusion rank #39,366 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.