Neptune

/ˈnɛptjuːn/

//ˈnɛptjuːn// name

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

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

The verdict

“Neptune” has 10 generated spelling variants in the English index at frequency #18,140. The variants make it a useful spelling check.

#18,140
frequency rank, English
1,534
“N” headwords
10
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The eighth planet in our solar system, represented in astronomy and astrology by ♆.

Corpus desk

Index EN-neptune · Neptune · English

Neptune · rank #18,140 · 10 variants · 0 confusables

  • FREQ-MID #18,140
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-MID 10 variants
  • BOOK-MID 1,534
  • PHOTO-FINISH necessities

Nearest frequency peer: necessities (-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.

Rank peers near misspelling magnet “Neptune”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “Neptune” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for Neptune
PropertyValue
HeadwordNeptune
LanguageEnglish
Part of speechProper noun
IPA/ˈnɛptjuːn/
Letters7
Frequency rank#18,140
Misspellings tracked10
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “Neptune”

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).Neptunelands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “necessities” (#18,139), “NERDS” (#18,141), “mums” (#18,138). Among 1,534 “N” headwords, “Neptune” is #18,140. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around Neptune (IPA /ˈnɛptjuːn/), aproper noun. Corpus frequency is #18,140 among 1,534 “N” headwords. Wiktionary lists 6 senses, so context still picks the gloss.

Our generated misspelling index lists 10 likely wrong-spelling variants for Neptune, with forms such as "enptune", "nepptune", and "neptnue". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. Our dataset records no confusable match here, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From Middle English Neptune, Neptunus, a borrowing from Latin Neptūnus, possibly from Proto-Indo-European *nébʰ-tu-s (“damp, cloudy”) (source of Ancient Greek νέφος (néphos), Sanskrit नभस् (nábhas), etc.), with the sense of "wet, moist." Puhvel, however, co… The correct English form is Neptune, spelled N-E-P-T-U-N-E.

Definition

  1. 1
    The eighth planet in our solar system, represented in astronomy and astrology by ♆.
  2. 2
    The god of the ocean and of earthquakes, equivalent to Poseidon in Greek mythology.
  3. 3
    A township in Monmouth County, New Jersey, United States.
  4. 4
    An unincorporated community in Mercer County, Ohio.
  5. 5
    An unincorporated community in Jackson County, West Virginia.
  6. 6
    An unincorporated community in Ithaca, Richland County, Wisconsin.

Recorded use

Wiktionary examples

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

  1. At a meeting of the French Academy of Science, M. Leverrier presented a fifth and final memoir on the new planet, which M. Arago proposes to be called Neptune.
  2. It was on the first day of the new year that the announcement was made, almost simultaneously from three observatories, that the motion of the planet Neptune, the outermost of all the planets that wheel about the sun, had become very erratic. Ogilvy had already called attention to a suspected retardation in its velocity in December. Such a piece of news w…

Etymology

From Middle English Neptune, Neptunus, a borrowing from Latin Neptūnus, possibly from Proto-Indo-European *nébʰ-tu-s (“damp, cloudy”) (source of Ancient Greek νέφος (néphos), Sanskrit नभस् (nábhas), etc.), with the sense of "wet, moist." Puhvel, however, connects it with Proto-Italic *nepōts from Proto-Indo-European *népōts by analogy to Portūnus, cognate with Vedic Apām Napāt and Avestan Apąm Napāt, Child (cf: neve, nephew) of the Water as part of an Indo-European 'Fire in the Water' myth.

Synonyms

♆⯉

This word in other languages

Neptuno(Español)Neptune(Français)Neptun(Deutsch)

Common misspellings

Also misspelled as:

  • enptune
  • nepptune
  • neptnue
  • nepttune
  • neptuen
  • neptunne
  • neputne
  • netpune
  • nneptune
  • npetune

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of Neptune - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

enptune2nepptune1neptnue2nepttune1neptuen2neptunne1neputne2netpune2
Edit distance from "Neptune"

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 "Neptune"?
"Neptune" is spelled N-E-P-T-U-N-E. The IPA pronunciation is /ˈnɛptjuːn/.
What does "Neptune" mean?
As a proper noun, "Neptune" means: The eighth planet in our solar system, represented in astronomy and astrology by ♆.
What are common misspellings of "Neptune"?
Common misspellings include "enptune", "nepptune", "neptnue", "nepttune", "neptuen". The correct spelling is "Neptune".
How do you pronounce "Neptune"?
The IPA (International Phonetic Alphabet) transcription for "Neptune" is /ˈnɛptjuːn/. 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 "Neptune"?
From Middle English Neptune, Neptunus, a borrowing from Latin Neptūnus, possibly from Proto-Indo-European *nébʰ-tu-s (“damp, cloudy”) (source of Ancient Greek νέφος (néphos), Sanskrit नभस् (nábhas), etc.), with the sense of "wet, moist." Puhvel, h... 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 "Neptune", not the corpus desk frequency band.

Same letter count

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

overrun#18,149parcels#18,150pasture#18,151payload#18,153

Similar misspelling depth

Headwords with a similar count of attested misspellings (10 here; floor ≥5).

pigeons10 variantsrevisit10 variantssensual10 variantssixties10 variants

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

Source: FrequencyWords open word-frequency list