Sydenham

/ˈsɪdənəm/

//ˈsɪdənəm// name

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

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

The verdict

“Sydenham” is uncommon English (frequency #55,785 among 54,294 “S” headwords), classed as a proper noun. The kind of spelling people second-guess.

#55,785
frequency rank, English
54,294
“S” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A placename:

Key facts for Sydenham
PropertyValue
HeadwordSydenham
LanguageEnglish
Part of speechProper noun
IPA/ˈsɪdənəm/
Letters8
Frequency rank#55,785
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “Sydenham” sits in English frequency

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

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

Sydenham is uncommon English at frequency #55,785 among 54,294 “S” headwords, classed as aproper noun, transcribed /ˈsɪdənəm/. Rarity is why readers land here mid-draft. 14 senses are on record.

Sydenham has no tracked misspelling variants, typically a sign the spelling maps closely to how the word sounds. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From Old English sīdan, dative of sīd (“large, spacious, wide”) + hamm (“water meadow”). The correct English form is Sydenham, spelled S-Y-D-E-N-H-A-M.

Definition

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    A habitational surname from Old English.

Etymology

From Old English sīdan, dative of sīd (“large, spacious, wide”) + hamm (“water meadow”).

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 "Sydenham"?
"Sydenham" is spelled S-Y-D-E-N-H-A-M. The IPA pronunciation is /ˈsɪdənəm/.
What does "Sydenham" mean?
As a proper noun, "Sydenham" means: A placename:
How do you pronounce "Sydenham"?
The IPA (International Phonetic Alphabet) transcription for "Sydenham" is /ˈsɪdənəm/. 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 "Sydenham"?
From Old English sīdan, dative of sīd (“large, spacious, wide”) + hamm (“water meadow”). 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.

Using “Sydenham”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is S-Y-D-E-N-H-A-M - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈsɪdənəm/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

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.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list