hay fever

noun

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

The verdict

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

Unranked
below top-frequency English
9
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An allergy to the pollen of grass or other plants that causes symptoms similar to those of a cold; pollinosis.

Corpus desk

Index EN-hay-fever · hay fever · English

hay fever · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "H" 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 hay fever
PropertyValue
Headwordhay fever
LanguageEnglish
Part of speechNoun
Letters9
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “hay fever” in English

hay feverranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

hay fever is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "An allergy to the pollen of grass or other plants that causes symptoms similar to those of a cold; pollinosis.".

No generated misspelling entries exist for hay fever in our index, a straightforward case of a spelling with little room for common typos. This entry stands alone in our confusable dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: First attested by John Bostock in 1819. The smell of hay in the summer was thought to be the origin of the condition. The correct English form is hay fever, spelled H-A-Y- -F-E-V-E-R.

Definition

  1. 1
    An allergy to the pollen of grass or other plants that causes symptoms similar to those of a cold; pollinosis.

Etymology

First attested by John Bostock in 1819. The smell of hay in the summer was thought to be the origin of the condition.

Synonyms

allergic rhinitishay asthmahay coldpollinosisrose fever

This word in other languages

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 "hay fever"?
"hay fever" is spelled H-A-Y- -F-E-V-E-R.
What does "hay fever" mean?
As a noun, "hay fever" means: An allergy to the pollen of grass or other plants that causes symptoms similar to those of a cold; pollinosis.
What is the origin of the word "hay fever"?
First attested by John Bostock in 1819. The smell of hay in the summer was thought to be the origin of the condition. 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