harmful

/ˈhɑːmfl̩/

//ˈhɑːmfl̩// adj

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

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

The verdict

“harmful” has 11 generated spelling variants in the English index at frequency #7,458. The variants make it a useful spelling check.

#7,458
frequency rank, English
2,646
“H” headwords
11
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Causing or likely to cause harm or damage; injurious.

Corpus desk

Index EN-harmful · harmful · English

harmful · rank #7,458 · 11 variants · 3 confusables

  • FREQ-COMMON #7,458
  • LEN-LONG 7 letters
  • VOW-2 2 vowels
  • CONFUS-LOW 3 pairs
  • VAR-MID 11 variants
  • BOOK-MID 2,646
  • PHOTO-FINISH hardcore

Nearest frequency peer: hardcore (-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 “harmful”

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

corpus weight

What this shows “harmful” 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).

harmful vs hateful
71% similar
harmful vs hurtful
71% similar
harmful vs handful
71% similar

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

Key facts for harmful
PropertyValue
Headwordharmful
LanguageEnglish
Part of speechAdjective
IPA/ˈhɑːmfl̩/
Letters7
Frequency rank#7,458
Misspellings tracked11
Confusable pairs3
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “harmful”

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).harmfullands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “hardcore” (#7,457), “headache” (#7,459), “handy” (#7,456). Among 2,646 “H” headwords, “harmful” is #7,458. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 11 spelling variants around harmful (IPA /ˈhɑːmfl̩/), anadjective. Corpus frequency is #7,458 among 2,646 “H” headwords. Dominant gloss: "Causing or likely to cause harm or damage; injurious.".

Our generated misspelling index lists 11 likely wrong-spelling variants for harmful, with forms such as "ahrmful", "hamrful", and "harfmul". 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 3 confusable-pair relationships, "hateful", "hurtful", "handful", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: From Middle English harmful, from Old English *hearmful (suggested by hearmfullīċ (“harmful; hurtful”)), equivalent to harm + -ful. Cognate with German harmvoll, Danish harmfuld, Swedish harmfull. The correct English form is harmful, spelled H-A-R-M-F-U-L.

Definition

  1. 1
    Causing or likely to cause harm or damage; injurious.

Recorded use

Wiktionary examples

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

  1. Wear a hat to protect your skin from harmful sunlight.
  2. Smoking is harmful to the lungs.

Etymology

From Middle English harmful, from Old English *hearmful (suggested by hearmfullīċ (“harmful; hurtful”)), equivalent to harm + -ful. Cognate with German harmvoll, Danish harmfuld, Swedish harmfull.

Synonyms

injuriousharmfuldamagingdeleteriousdetrimentalhurtfulinimicalmischievousnocentnocuousnoxiousnoisomeprejudicialscathandscathelsullenvenom

Antonyms

beneficialharmlesshelpfulvaluableinnocentinnocuousinnoxiousinoffensiveundamagingunharmful

This word in other languages

perjudicial(Español)dangereux(Français)schädlich(Deutsch)prejudicial(Português)

Common misspellings

Also misspelled as:

  • ahrmful
  • hamrful
  • harfmul
  • harmfful
  • harmflu
  • harmfull
  • harmmful
  • harmufl
  • harrmful
  • hharmful
  • hramful

Misspelling Pattern Breakdown

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

ahrmful2hamrful2harfmul2harmfful1harmflu2harmfull1harmmful1harmufl2
Edit distance from "harmful"

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 "harmful"?
"harmful" is spelled H-A-R-M-F-U-L. The IPA pronunciation is /ˈhɑːmfl̩/.
What does "harmful" mean?
As an adjective, "harmful" means: Causing or likely to cause harm or damage; injurious.
What words are commonly confused with "harmful"?
"harmful" is commonly confused with "hateful", "hurtful", "handful". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "harmful"?
The IPA (International Phonetic Alphabet) transcription for "harmful" is /ˈhɑːmfl̩/. 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 "harmful"?
From Middle English harmful, from Old English *hearmful (suggested by hearmfullīċ (“harmful; hurtful”)), equivalent to harm + -ful. Cognate with German harmvoll, Danish harmfuld, Swedish harmfull. 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 "harmful", not the corpus desk frequency band.

Same letter count

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

kissing#7,467licence#7,469madness#7,471mandate#7,472

Similar misspelling depth

Headwords with a similar count of attested misspellings (11 here; floor ≥5).

headache11 variantsdelight11 variantscolumns11 variantsbullying11 variants

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

Source: FrequencyWords open word-frequency list