REM vs ROC, What's the Difference?

Which to use

“REM” is a noun and “ROC” is an abbrev - they look or sound alike but fill different roles in a sentence.

#35,225
“REM” frequency rank: #41,056
“ROC” frequency rank: 76281
confusion score

Side-by-Side Comparison

Feature	REM	ROC
Definition	Fase del sueño durante la que suceden los ensueños más intensos. Durante esta fase, los ojos se mueven rápidamente y la actividad de las neuronas del cerebro se asemeja a la de cuando se está despierto.	Sigla de Reglamento Orgánico de Centro.

Where the spellings diverge

Shared letters are muted; the letters that actually set REM and ROC apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

3 ch

REM

3 ch

ROC

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: REM is [ˈrẽm] while ROC is [ˈrok]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs abbrev), which is usually the fastest check. Our composite confusion score for this pair is 76281, derived from the frequency rank of both members and their visual similarity.

REM is recorded at frequency rank #35,225, classified as anoun, pronounced [ˈrẽm]. ROC is at rank #41,056, tagged as anabbrev, pronounced [ˈrok].

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 76281, this pair ranks #18,042 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of REM vs ROC

Shared letters: r. Private to "REM": em. Private to "ROC": co.

"REM" · 3 letters · shape CVC · "ROC" · 3 letters · shape CVC

Frequency comparison

REM#35,225

ROC#41,056

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "REM" and "ROC" be used interchangeably?

No - they are not even the same part of speech. "REM" is a noun and "ROC" an abbrev, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "REM" or "ROC"?

"REM" is the more common of the two: it sits at frequency rank #35,225 in our Spanish list, against #41,056 for "ROC". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering REM vs ROC

The fastest way to pick the right one every time.

Check the role first: if you need a noun, it's “REM”; for an abbrev, it's “ROC”.
See each word in full, definition, IPA, etymology and its other confusables. Full “REM” entry
Browse more pairs most likely to be confused. Most confusable