helium

/ˈhiː.li.əm/

//ˈhiː.li.əm// noun

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

"helium" is a 6-letter English headword indexed on PlainSpell.

The verdict

“helium” has 8 generated spelling variants in the English index at frequency #16,725. The variants make it a useful spelling check.

#16,725
frequency rank, English
2,646
“H” headwords
8
tracked misspellings
4
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.

Corpus desk

Index EN-helium · helium · English

helium · rank #16,725 · 8 variants · 4 confusables

  • FREQ-MID #16,725
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-MID 4 pairs
  • VAR-MID 8 variants
  • BOOK-MID 2,646
  • PHOTO-FINISH hemp

Nearest frequency peer: hemp (+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 “helium”

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

corpus weight

What this shows “helium” 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).

helium vs helm
67% similar
helium vs helix
67% similar
helium vs heli
67% similar

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

Key facts for helium
PropertyValue
Headwordhelium
LanguageEnglish
Part of speechNoun
IPA/ˈhiː.li.əm/
Letters6
Frequency rank#16,725
Misspellings tracked8
Confusable pairs4
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “helium”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).heliumlands here:

#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. Same rarity band neighbours include “hemp” (#16,726), “haze” (#16,723), “hitch” (#16,727). Among 2,646 “H” headwords, “helium” is #16,725. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 8 spelling variants around helium (IPA /ˈhiː.li.əm/), anoun. Corpus frequency is #16,725 among 2,646 “H” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 8 likely wrong-spelling variants for helium, with forms such as "ehlium", "heilum", and "helimu". 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. It also participates in 4 confusable-pair relationships, "helm", "helix", "heli", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From New Latin helium, from Ancient Greek ἥλιος (hḗlios, “sun”) (because its presence was first theorised in the Sun's atmosphere) with the suffix + -ium. Probably coined by Norman Lockyer. This suffix is unusual, because it is usually used only for metalli… The correct English form is helium, spelled H-E-L-I-U-M.

Definition

  1. 1
    The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.
  2. 2
    A form or sample of the element.

Recorded use

Wiktionary example

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

  1. It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars.

Etymology

From New Latin helium, from Ancient Greek ἥλιος (hḗlios, “sun”) (because its presence was first theorised in the Sun's atmosphere) with the suffix + -ium. Probably coined by Norman Lockyer. This suffix is unusual, because it is usually used only for metallic elements. It is likely that Lockyer, being an astronomer, was unaware of the usual chemical conventions.

Synonyms

E939 when used as a packaging gas

This word in other languages

helio(Español)hélium(Français)Helium(Deutsch)hélio(Português)

Common misspellings

Also misspelled as:

  • ehlium
  • heilum
  • helimu
  • heliumm
  • hellium
  • heluim
  • hhelium
  • hleium

Misspelling Pattern Breakdown

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

ehlium2heilum2helimu2heliumm1hellium1heluim2hhelium1hleium2
Edit distance from "helium"

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 "helium"?
"helium" is spelled H-E-L-I-U-M. The IPA pronunciation is /ˈhiː.li.əm/.
What does "helium" mean?
As a noun, "helium" means: The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.
What words are commonly confused with "helium"?
"helium" is commonly confused with "helm", "helix", "heli". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "helium"?
The IPA (International Phonetic Alphabet) transcription for "helium" is /ˈhiː.li.əm/. 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 "helium"?
From New Latin helium, from Ancient Greek ἥλιος (hḗlios, “sun”) (because its presence was first theorised in the Sun's atmosphere) with the suffix + -ium. Probably coined by Norman Lockyer. This suffix is unusual, because it is usually used only f... 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 "helium", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 6 letters (nearest by frequency rank).

frying#16,717fishes#16,710filler#16,709lavish#16,741

Similar misspelling depth

Headwords with a similar count of attested misspellings (8 here; floor ≥5).

hitch8 variantsFritz8 variantsfacade8 variantsnoodle8 variants

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

Source: FrequencyWords open word-frequency list