Ob

name

The verdict

“Ob” is a moderately-common French word, ranked #31,155 in French word frequency and used as a proper noun.

#31,155
frequency rank, French
2
letters
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Fleuve de Sibérie, qui se jette dans l’océan Arctique.

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

Ob vs on
0% similar
Ob vs ou
0% similar
Ob vs or
0% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for Ob
PropertyValue
HeadwordOb
LanguageFrench
Part of speechProper noun
Letters2
Frequency rank#31,155
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “Ob” sits in French frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). Ob lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The French entry for Ob is 2 letters long, classified as a proper noun. Corpus data places it at rank #31,155 in overall French word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "Fleuve de Sibérie, qui se jette dans l’océan Arctique.".

Ob doesn't appear in our generated misspelling index, a sign its spelling follows regular French conventions. It also participates in 20 confusable-pair relationships, "on", "ou", "or", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

This entry's etymology isn't recorded, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct French form is Ob, spelled O-B.

Definition

  1. 1
    Fleuve de Sibérie, qui se jette dans l’océan Arctique.

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "Ob"?
"Ob" is spelled O-B.
What does "Ob" mean?
As a proper noun, "Ob" means: Fleuve de Sibérie, qui se jette dans l’océan Arctique.
What words are commonly confused with "Ob"?
"Ob" is commonly confused with "on", "ou", "or". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "Ob" come from?
"Ob" is a French word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “Ob”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct French spelling is O-B - every other letter order is a misspelling in standard orthography.
  • Don't mix it up with “on” - see the side-by-side comparison. Ob vs on
  • Browse more French words and confusable pairs in the same reference. French words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list