In the English alphabet, it's the only polysyllabic letter
They're still dependent on 
dialect, but it's slightly easier than listing all the monosyllabic words that you... [DOC] [TLE] Fun With Words: Word Oddities - RinkWorks [PAR] Tittifill, nine letters long, is the longest English word consisting only of letters with 
... Sestettes is a word in which each of its letters occurs three times.