octogenarian
/ˌɑktəd͡ʒɪˈnɛɹiən/
"octogenarian" is a 12-letter English headword indexed on PlainSpell.
The verdict
“octogenarian” is uncommon English (frequency #78,885 among 15,494 “O” headwords), classed as a noun. The kind of spelling people second-guess.
- #78,885
- frequency rank, English
- 15,494
- “O” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Synonym of eightysomething: a person between 80 and 89 years old.
| Property | Value |
|---|---|
| Headword | octogenarian |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌɑktəd͡ʒɪˈnɛɹiən/ |
| Letters | 12 |
| Frequency rank | #78,885 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “octogenarian” sits in English frequency
Rare enough to double-check
octogenarian is uncommon English at frequency #78,885 among 15,494 “O” headwords, classed as anoun, transcribed /ˌɑktəd͡ʒɪˈnɛɹiən/. Rarity is why readers land here mid-draft. Gloss: "Synonym of eightysomething: a person between 80 and 89 years old.".
Zero misspellings are on record for octogenarian in our index, which points to an orthography that plays by predictable English rules. No close-neighbour confusable shows up for this headword in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From Latin octōgēnārius + -an (suffix forming adjectives and representative nouns), either directly or via French octogénaire, from Latin octōgēnus (“80 each”) + -ārius (“-ary”), from octōgintā (“eight tens, 80”). The correct English form is octogenarian, spelled O-C-T-O-G-E-N-A-R-I-A-N.
Definition
- 1Synonym of eightysomething: a person between 80 and 89 years old.
Etymology
From Latin octōgēnārius + -an (suffix forming adjectives and representative nouns), either directly or via French octogénaire, from Latin octōgēnus (“80 each”) + -ārius (“-ary”), from octōgintā (“eight tens, 80”).
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
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Using “octogenarian”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is O-C-T-O-G-E-N-A-R-I-A-N - every other letter order is a misspelling in standard orthography.
- Say it as /ˌɑktəd͡ʒɪˈnɛɹiən/ (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
Other uncommon English words near this rank
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.