supermoon

noun

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

"supermoon" is a 9-letter English headword indexed on PlainSpell.

The verdict

“supermoon” is uncommon English (frequency #99,912 among 6,566 “S” headwords), classed as a noun. The kind of spelling people second-guess.

#99,912
frequency rank, English
6,566
“S” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A full moon or new moon, when the Earth–Moon distance is in the lowest tenth of its range.

Corpus desk

Index EN-supermoon · supermoon · English

supermoon · rank #99,912 · 0 variants · 0 confusables

  • FREQ-RARE #99,912
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 6,566
  • PHOTO-FINISH superimposing

Nearest frequency peer: superimposing (-1 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.

Frequency neighbourhood for “supermoon”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “supermoon” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for supermoon
PropertyValue
Headwordsupermoon
LanguageEnglish
Part of speechNoun
Letters9
Frequency rank#99,912
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “supermoon” sits in English frequency

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).supermoon lands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

supermoon is uncommon English at frequency #99,912 among 6,566 “S” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A full moon or new moon, when the Earth–Moon distance is in the lowest tenth of its range.".

supermoon has no tracked misspelling variants, since its letter sequence doesn't invite the usual edit-distance slips. No confusable counterpart is on file for this word, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From super- + moon. Coined by astrologer Richard Nolle in 1979. The correct English form is supermoon, spelled S-U-P-E-R-M-O-O-N.

Definition

  1. 1
    A full moon or new moon, when the Earth–Moon distance is in the lowest tenth of its range.

Recorded use

Wiktionary example

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

  1. And should the moon happen to hit its ever-shifting orbital perigee at the same time that it lies athwart from the sun, we are treated to a so-called supermoon, a full moon that can seem close enough to embrace – as much as 12 percent bigger and 30 percent brighter than the average full moon. […] Some astronomers dislike the whole supermoon hoopla. They p…

Etymology

From super- + moon. Coined by astrologer Richard Nolle in 1979.

This word in other languages

Supermond(Deutsch)

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.

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 3, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "supermoon"?
"supermoon" is spelled S-U-P-E-R-M-O-O-N.
What does "supermoon" mean?
As a noun, "supermoon" means: A full moon or new moon, when the Earth–Moon distance is in the lowest tenth of its range.
What is the origin of the word "supermoon"?
From super- + moon. Coined by astrologer Richard Nolle in 1979. 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 "supermoon", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

Szymanski#99,918straggler#99,903tamponade#99,921Steadicam#99,898

What to do next

You've looked up "supermoon". Here's where to go from here.

  • Usage frequency rank #99,912 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "S" letter cohort. S–Z browse
  • PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.

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