egovsemWhat's the difference?

Quick tell: ego is a noun, em is a preposition, so they fill different roles in a sentence.

Which to use

“ego” is a noun and “em” is a preposition - they look or sound alike but fill different roles in a sentence.

#6,904
“ego” frequency rank
#7,152
“em” frequency rank
14056
confusion score

Side-by-Side Comparison

Feature ego em
Definition Conciencia de la persona humana, en especial en cuanto es capaz de percibir la realidad En.

Where the eye mixes ego and em

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
ego
2 ch
em

Why the eye confuses ego with em

These two trip readers on the page rather than in the ear: ego is [ˈeɣ̞o] while em is [ĩ]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 14056, derived from the frequency rank of both members and their visual similarity.

ego is recorded at frequency rank #6,904, classified as anoun, pronounced [ˈeɣ̞o]. em is at rank #7,152, tagged as aprep, pronounced [ĩ].

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 14056, this pair ranks #285,551 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ego vs em

Shared letters: e. Private to "ego": go. Private to "em": m.

"ego" · 3 letters · shape VCV  ·  "em" · 2 letters · shape VC

Frequently Asked Questions

Can "ego" and "em" be used interchangeably?
No - they are not even the same part of speech. "ego" is a noun and "em" a preposition, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ego" or "em"?
"ego" is the more common of the two: it sits at frequency rank #6,904 in our Spanish list, against #7,152 for "em". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "ego" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "em" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #285,551 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "ego" and "em" also get mixed up with nearby pairs, the highest-scored neighbour is "em vs EPL". Nearby pair

Confusion rank #285,551 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list