nuclear

/ˈn(j)u.kli.ɚ/

//ˈn(j)u.kli.ɚ// adj

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

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

The verdict

“nuclear” has 9 generated spelling variants in the English index at frequency #1,911. The variants make it a useful spelling check.

#1,911
frequency rank, English
1,534
“N” headwords
9
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Pertaining to the nucleus of an atom.

Corpus desk

Index EN-nuclear · nuclear · English

nuclear · rank #1,911 · 9 variants · 3 confusables

  • FREQ-COMMON #1,911
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-LOW 3 pairs
  • VAR-MID 9 variants
  • BOOK-MID 1,534
  • PHOTO-FINISH mountain

Nearest frequency peer: mountain (-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 “nuclear”

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

corpus weight

What this shows “nuclear” 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

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

nuclear vs nuclei
71% similar
nuclear vs nucleus
71% similar
nuclear vs nucleic
71% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for nuclear
PropertyValue
Headwordnuclear
LanguageEnglish
Part of speechAdjective
IPA/ˈn(j)u.kli.ɚ/
Letters7
Frequency rank#1,911
Misspellings tracked9
Confusable pairs3
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “nuclear”

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).nuclearlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “mountain” (#1,910), “orders” (#1,912), “mention” (#1,909). Among 1,534 “N” headwords, “nuclear” is #1,911. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 9 spelling variants around nuclear (IPA /ˈn(j)u.kli.ɚ/), anadjective. Corpus frequency is #1,911 among 1,534 “N” headwords. Wiktionary lists 8 senses, so context still picks the gloss.

Our generated misspelling index lists 9 likely wrong-spelling variants for nuclear, with forms such as "nculear", "nnuclear", and "nucclear". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 3 confusable-pair relationships, "nuclei", "nucleus", "nucleic", a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Latin nū̆cleus, a contraction of the adjective nuculeus, masculine of feminine nuculea (“pertaining to a small nut”) from nucula + adjectival suffix -eus, -ea, -eum. The Latin nucula + -āris adds up to nuculāris, a term that in English becomes nucular;… The correct English form is nuclear, spelled N-U-C-L-E-A-R.

Definition

  1. 1
    Pertaining to the nucleus of an atom.
  2. 2
    Involving energy released by nuclear reactions (fission, fusion, radioactive decay).
  3. 3
    Relating to a weapon that derives its force from rapid release of energy through nuclear reactions.
  4. 4
    Having nuclear weapons.
  5. 5
    Involving an extreme course of action, or one with severe consequences.
  6. 6
    Pertaining to the nucleus of a cell.
  7. 7
    Pertaining to a centre around which something is developed or organised; central, pivotal.
  8. 8
    Relating to, being of, or comprising the nuclear family.

Recorded use

Wiktionary examples

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

  1. a nuclear reactor
  2. nuclear technology

Etymology

From Latin nū̆cleus, a contraction of the adjective nuculeus, masculine of feminine nuculea (“pertaining to a small nut”) from nucula + adjectival suffix -eus, -ea, -eum. The Latin nucula + -āris adds up to nuculāris, a term that in English becomes nucular; the Latin nuculea + -āris, becomes Latin nuculeāris (“relative to what pertains to small nut”), later contracted into nuclear. By surface analysis, nucleus + -ar. Compare muscle and Latin mūsculus; muscular and mūsculāris.

This word in other languages

nuclear(Español)nucléaire(Français)nuklear(Deutsch)nuclear(Português)

Common misspellings

Also misspelled as:

  • nculear
  • nnuclear
  • nucclear
  • nucelar
  • nuclaer
  • nuclearr
  • nuclera
  • nucllear
  • nulcear

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of nuclear - 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.

nculear2nnuclear1nucclear1nucelar2nuclaer2nuclearr1nuclera2nucllear1
Edit distance from "nuclear"

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 "nuclear"?
"nuclear" is spelled N-U-C-L-E-A-R. The IPA pronunciation is /ˈn(j)u.kli.ɚ/.
What does "nuclear" mean?
As an adjective, "nuclear" means: Pertaining to the nucleus of an atom.
What words are commonly confused with "nuclear"?
"nuclear" is commonly confused with "nuclei", "nucleus", "nucleic". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "nuclear"?
The IPA (International Phonetic Alphabet) transcription for "nuclear" is /ˈn(j)u.kli.ɚ/. 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 "nuclear"?
From Latin nū̆cleus, a contraction of the adjective nuculeus, masculine of feminine nuculea (“pertaining to a small nut”) from nucula + adjectival suffix -eus, -ea, -eum. The Latin nucula + -āris adds up to nuculāris, a term that in English become... 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 "nuclear", not the corpus desk frequency band.

Same letter count

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

mention#1,909Spanish#1,920figures#1,898victory#1,926

Similar misspelling depth

Headwords with a similar count of attested misspellings (9 here; floor ≥5).

orders9 variantshonest9 variantsdropped9 variantsclassic9 variants

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

Source: FrequencyWords open word-frequency list