promethium
/pɹoʊˈmiːθiəm/
"promethium" is a 10-letter English headword indexed on PlainSpell.
The verdict
“promethium” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 10
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A metallic chemical element (symbol Pm) with an atomic number of 61.
| Property | Value |
|---|---|
| Headword | promethium |
| Language | English |
| Part of speech | Noun |
| IPA | /pɹoʊˈmiːθiəm/ |
| Letters | 10 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “promethium” sits in English frequency
Rare enough to double-check
promethium is uncommon English outside the top frequency list, classed as anoun, transcribed /pɹoʊˈmiːθiəm/. Rarity is why readers land here mid-draft. Gloss: "A metallic chemical element (symbol Pm) with an atomic number of 61.".
The misspelling generator found no plausible variants for promethium, a sign its spelling follows regular English conventions. This entry stands alone in our confusable dataset, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: 1945. From the name of the Greek god Prometheus, who stole the fire from Mount Olympus and brought it down to mankind + -ium. The correct English form is promethium, spelled P-R-O-M-E-T-H-I-U-M.
Definition
- 1A metallic chemical element (symbol Pm) with an atomic number of 61.
Etymology
1945. From the name of the Greek god Prometheus, who stole the fire from Mount Olympus and brought it down to mankind + -ium.
Synonyms
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). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “promethium”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is P-R-O-M-E-T-H-I-U-M - every other letter order is a misspelling in standard orthography.
- Say it as /pɹoʊˈmiːθiəm/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English 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.