forty-eightmo

noun

"forty-eightmo" is a 12-letter English headword indexed on PlainSpell.

The verdict

“forty-eightmo” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
13
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - quadragesimo-octavo (as a paper size in printing).

Corpus desk

Index EN-forty-eightmo · forty-eightmo · English

forty-eightmo · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 13 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "F" thin
  • PHOTO-UNK Peer pending

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.

Key facts for forty-eightmo
PropertyValue
Headwordforty-eightmo
LanguageEnglish
Part of speechNoun
Letters13
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “forty-eightmo” in English

forty-eightmosits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

forty-eightmo is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "quadragesimo-octavo (as a paper size in printing).".

The misspelling generator found no plausible variants for forty-eightmo, a straightforward case of a spelling with little room for common typos. This entry stands alone in our confusable dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From forty-eight + -mo. The correct English form is forty-eightmo, spelled F-O-R-T-Y---E-I-G-H-T-M-O.

Definition

  1. 1
    quadragesimo-octavo (as a paper size in printing).

Etymology

From forty-eight + -mo.

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

How do you spell "forty-eightmo"?
"forty-eightmo" is spelled F-O-R-T-Y---E-I-G-H-T-M-O.
What does "forty-eightmo" mean?
As a noun, "forty-eightmo" means: quadragesimo-octavo (as a paper size in printing).
What is the origin of the word "forty-eightmo"?
From forty-eight + -mo. 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.

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

Source: FrequencyWords open word-frequency list