massless

/ˈmæs.ləs/

//ˈmæs.ləs// adj

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

"massless" is a 8-letter English headword indexed on PlainSpell.

The verdict

“massless” is uncommon English (frequency #78,809 among 4,057 “M” headwords), classed as an adjective. The kind of spelling people second-guess.

#78,809
frequency rank, English
4,057
“M” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Having no mass.

Corpus desk

Index EN-massless · massless · English

massless · rank #78,809 · 0 variants · 0 confusables

  • FREQ-RARE #78,809
  • LEN-LONG 8 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 4,057
  • PHOTO-FINISH Masi

Nearest frequency peer: Masi (-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.

Long-tail ranks near “massless”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “massless” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for massless
PropertyValue
Headwordmassless
LanguageEnglish
Part of speechAdjective
IPA/ˈmæs.ləs/
Letters8
Frequency rank#78,809
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “massless” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).masslessfalls in this rarity band:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “Masi” (#78,808), “matsu” (#78,811), “Malam” (#78,805). Among 4,057 “M” headwords, “massless” is #78,809. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

massless is uncommon English at frequency #78,809 among 4,057 “M” headwords, classed as anadjective, transcribed /ˈmæs.ləs/. Rarity is why readers land here mid-draft. Gloss: "Having no mass.".

Our edit-distance generator produced no likely misspellings for massless, a straightforward case of a spelling with little room for common typos. Our confusable-pair dataset has no match for it, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From mass + -less. The correct English form is massless, spelled M-A-S-S-L-E-S-S.

Definition

  1. 1
    Having no mass.

Recorded use

Wiktionary examples

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

  1. The photon is a massless particle.
  2. On the other hand, Pauli had just proposed a massless, chargeless, colorless, flavorless particle whose sole reason for existence was to preserve the principle of momentum conservation.

Etymology

From mass + -less.

Antonyms

massive

This word in other languages

masselos(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.

Frequently Asked Questions

How do you spell "massless"?
"massless" is spelled M-A-S-S-L-E-S-S. The IPA pronunciation is /ˈmæs.ləs/.
What does "massless" mean?
As an adjective, "massless" means: Having no mass.
How do you pronounce "massless"?
The IPA (International Phonetic Alphabet) transcription for "massless" is /ˈmæs.ləs/. 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 "massless"?
From mass + -less. 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 "massless", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

mailroom#78,803locative#78,788Lipinski#78,786nanotech#78,854

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

Source: FrequencyWords open word-frequency list