heartworm
"heartworm" is a 9-letter English headword indexed on PlainSpell.
The verdict
“heartworm” is uncommon English (frequency #87,358 among 2,646 “H” headwords), classed as a noun. The kind of spelling people second-guess.
- #87,358
- frequency rank, English
- 2,646
- “H” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A parasitic organism that afflicts dogs, of species Dirofilaria immitis of roundworms.
Corpus desk
Index EN-heartworm · heartworm · English
heartworm · rank #87,358 · 0 variants · 0 confusables
- FREQ-RARE #87,358
- LEN-LONG 9 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,646
- PHOTO-FINISH Heebie
Nearest frequency peer: Heebie (+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.
Frequency neighbourhood for “heartworm”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- harangue
harangue
12,649 corpus weight
- harking
harking
12,646 corpus weight
- heartworm
heartworm
12,643 corpus weight
- Heebie
Heebie
12,642 corpus weight
- Hijra
Hijra
12,639 corpus weight
- Himmel
Himmel
12,637 corpus weight
What this shows Bars show where “heartworm” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | heartworm |
| Language | English |
| Part of speech | Noun |
| Letters | 9 |
| Frequency rank | #87,358 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “heartworm” sits in English frequency
Rare enough to double-check
heartworm is uncommon English at frequency #87,358 among 2,646 “H” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
No misspelling variants are generated for heartworm in our index, typically a sign the spelling maps closely to how the word sounds. This headword has no recorded confusable partner, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
Etymologically, the entry records: From heart + worm. The correct English form is heartworm, spelled H-E-A-R-T-W-O-R-M.
Definition
- 1A parasitic organism that afflicts dogs, of species Dirofilaria immitis of roundworms.
- 2(uncountable) The condition caused by this organism.
Etymology
From heart + worm.
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "heartworm", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).
What to do next
You've looked up "heartworm". Here's where to go from here.
- Usage frequency rank #87,358 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "H" letter cohort. H–Z browse
- PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.