space cadet

noun

"space-cadet" is a 10-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
11
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A person in training to be a (generally military) astronaut.

Corpus desk

Index EN-space-cadet · space cadet · English

space cadet · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 11 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "S" 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 space cadet
PropertyValue
Headwordspace cadet
LanguageEnglish
Part of speechNoun
Letters11
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “space cadet” in English

space cadetsits 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

space cadet is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.

Our edit-distance generator produced no likely misspellings for space cadet, suggesting the orthography follows predictable English patterns. This entry stands alone in our confusable dataset, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From the title of the 1948 science fiction novel Space Cadet, by Robert A. Heinlein. The correct English form is space cadet, spelled S-P-A-C-E- -C-A-D-E-T.

Definition

  1. 1
    A person in training to be a (generally military) astronaut.
  2. 2
    One who deals with reality in a way consistent with being under the influence of (or "spaced out on") drugs.
  3. 3
    One who forgets, daydreams, or otherwise is distracted from reality more often than most.

Etymology

From the title of the 1948 science fiction novel Space Cadet, by Robert A. Heinlein.

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 "space cadet"?
"space cadet" is spelled S-P-A-C-E- -C-A-D-E-T.
What does "space cadet" mean?
As a noun, "space cadet" means: A person in training to be a (generally military) astronaut.
What is the origin of the word "space cadet"?
From the title of the 1948 science fiction novel Space Cadet, by Robert A. Heinlein. 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