RATPvsRTWhich spelling fits?

Quick tell: RATP is a name, RT is a noun, so they fill different roles in a sentence.

Which to use

“RATP” is a name and “RT” is a noun - they look or sound alike but fill different roles in a sentence.

#9,546
“RATP” frequency rank
#10,937
“RT” frequency rank
20483
confusion score

Side-by-Side Comparison

Feature RATP RT
Definition Entreprise française publique qui gère le métro parisien et divers autres transports urbains (autobus, tramway, RER) à Paris et dans sa banlieue. Rediffusion d’un tweet effectué par un autre compte Twitter.

Where the eye mixes RATP and RT

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

4 ch
RATP
2 ch
RT

Look-alike desk: RATP vs RT

These two trip readers on the page rather than in the ear: RATP is \ɛ.ʁa.te.pe\ while RT is \ɛʁ.te\. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 20483, derived from the frequency rank of both members and their visual similarity.

RATP is recorded at frequency rank #9,546, classified as aname, pronounced \ɛ.ʁa.te.pe\. RT is at rank #10,937, tagged as anoun, pronounced \ɛʁ.te\.

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 20483, this pair ranks #368,060 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of RATP vs RT

Shared letters: rt. Private to "RATP": ap. Private to "RT": -.

"RATP" · 4 letters · shape CVCC  ·  "RT" · 2 letters · shape CC

Known mistypes of this pair

  • RATPartp · ratpp · rattp · rratp · rtap

Frequently Asked Questions

Can "RATP" and "RT" be used interchangeably?
No - they are not even the same part of speech. "RATP" is a name and "RT" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "RATP" vs "RT" - which ranks higher?
"RATP" is the more common of the two: it sits at frequency rank #9,546 in our French list, against #10,937 for "RT". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "RATP" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "RT" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #368,060 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "RATP" and "RT" also get mixed up with nearby pairs, the highest-scored neighbour is "rog vs RT". 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 #368,060 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list