What are the word records for repeated letters, most?

language/english/spelling/structure/subset.of.word/repeated.letters New

New entry, edited from material collected for the archive and not yet in a released version.

Problem

What are the word records for repeated letters, most?
(Spelling / Structure / Subset of Word)

[ Editor: question framed by the editor from the headings of the Taxonomy of Wordplay. ]

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[ Editor: from the Taxonomy of Wordplay, www.questrel.com, retrieved 28 Oct 2026. Classes (common, uncommon, hyphenated words, phrases), scores, ties (-t) and the source codes in brackets are explained in language/english/word.records.introduction. ]

common words: psychophysiological, electroencephalography (8-t)
uncommon words: supercalifragilisticexpialidocious, dichlorodiphenyltrichloroethane, laryngotracheobronchitises, octamethylpyrophosphoramides, phosphatidylethanolamines (10-t)
phrases: a bird in the hand is worth two in the bush, psychopathic personality disorder, the decline and fall of the roman empire (12-t)

-- Taxonomy of Wordplay, www.questrel.com