niobium

/naɪˈoʊbiəm/

//naɪˈoʊbiəm// noun

By · According to Wiktionary data (CC BY-SA) ·

"niobium" is a 7-letter English headword indexed on PlainSpell.

The verdict

“niobium” is uncommon English (frequency #63,843 among 1,534 “N” headwords), classed as a noun. The kind of spelling people second-guess.

#63,843
frequency rank, English
1,534
“N” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A chemical element (symbol Nb) with an atomic number of 41: a light grey, crystalline, ductile transition metal used in superconducting materials.

Corpus desk

Index EN-niobium · niobium · English

niobium · rank #63,843 · 0 variants · 0 confusables

  • FREQ-RARE #63,843
  • LEN-LONG 7 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,534
  • PHOTO-FINISH northerner

Nearest frequency peer: northerner (+3 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Long-tail ranks near “niobium”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “niobium” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for niobium
PropertyValue
Headwordniobium
LanguageEnglish
Part of speechNoun
IPA/naɪˈoʊbiəm/
Letters7
Frequency rank#63,843
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “niobium” in English

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).niobiumfalls in this rarity band:

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

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “northerner” (#63,846), “NRW” (#63,848), “neuroses” (#63,836). Among 1,534 “N” headwords, “niobium” is #63,843. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

niobium is uncommon English at frequency #63,843 among 1,534 “N” headwords, classed as anoun, transcribed /naɪˈoʊbiəm/. Rarity is why readers land here mid-draft. 2 senses are on record.

No misspelling variants are generated for niobium in our index, which points to an orthography that plays by predictable English rules. This entry stands alone in our confusable dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From Niobe + -ium, because of the element's affinity with tantalum, named after Niobe's father Tantalus. The correct English form is niobium, spelled N-I-O-B-I-U-M.

Definition

  1. 1
    A chemical element (symbol Nb) with an atomic number of 41: a light grey, crystalline, ductile transition metal used in superconducting materials.
  2. 2
    A single atom of this element.

Recorded use

Wiktionary example

These source excerpts show how niobium appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. One should use hypoallergenic jewelry made of surgical grade stainless steel, titanium, 14- or 18-karat gold, or niobium, especially for initial piercings.

Etymology

From Niobe + -ium, because of the element's affinity with tantalum, named after Niobe's father Tantalus.

Synonyms

columbiumdianium

This word in other languages

niobio(Español)niobium(Français)Niob(Deutsch)nióbio(Português)

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 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "niobium"?
"niobium" is spelled N-I-O-B-I-U-M. The IPA pronunciation is /naɪˈoʊbiəm/.
What does "niobium" mean?
As a noun, "niobium" means: A chemical element (symbol Nb) with an atomic number of 41: a light grey, crystalline, ductile transition metal used in superconducting materials.
How do you pronounce "niobium"?
The IPA (International Phonetic Alphabet) transcription for "niobium" is /naɪˈoʊbiəm/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "niobium"?
From Niobe + -ium, because of the element's affinity with tantalum, named after Niobe's father Tantalus. See the full etymology section above for more details.
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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "niobium", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

oxalate#63,867mincing#63,801pinhead#63,892Marsala#63,786

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

Source: FrequencyWords open word-frequency list