theirvsTierWhat's the difference?

Quick tell: their is a determiner, Tier is a name, so they fill different roles in a sentence.

Which to use

“their” is a determiner and “Tier” is a name - they look or sound alike but fill different roles in a sentence.

#16,023
“their” frequency rank
#26,203
“Tier” frequency rank
42226
confusion score

Side-by-Side Comparison

Feature their Tier
Definition Leur, leurs. Entreprise qui propose des services de location de véhicules en libre-service.

Letter map: their vs Tier

Shared letters muted; letters that set their and Tier apart highlighted. Shared run: 3.

5 ch
their
4 ch
Tier

Part-of-speech tell for their / Tier

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: their is adeterminer and Tieraname. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 42226, derived from the frequency rank of both members and their visual similarity.

their is recorded at frequency rank #16,023, classified as adet, pronounced \ðɛə(ɹ)\. Tier is at rank #26,203, tagged as aname.

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 42226, this pair ranks #227,230 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of their vs Tier

Shared letters: eirt. Private to "their": h. Private to "Tier": -.

"their" · 5 letters · shape CCVVC  ·  "Tier" · 4 letters · shape CVVC

Known mistypes of this pair

  • theirhteir · tehir · theirr · theri · thheir · thier · ttheir
  • Tierteir · ttier

Frequently Asked Questions

Is swapping "their" for "Tier" ever safe?
No - they are not even the same part of speech. "their" is a determiner and "Tier" a name, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "their" or "Tier" show up more?
"their" is the more common of the two: it sits at frequency rank #16,023 in our French list, against #26,203 for "Tier". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "their" vs "Tier" is on the table, pick a follow-up below.

  • Full dictionary entry for "their" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Tier" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #227,230 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "their" and "Tier" also get mixed up with nearby pairs, the highest-scored neighbour is "Tier vs tif". 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 #227,230 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