The other day, while playing Scrabble, I started to think about words that have only one repeated vowel in them (like, for instance, “canasta”).
I tried to see what was the longest word I could come up with that would have this particular characteristic. In English, my best efforts were:
-With some cheating, “Invisibility” (all vowels sound like short “I”, but the last is written as “y”).
-Without cheating, “catamaran”.
Can you do better? Also, examples in other languages would be welcome 
does anyone pronounce the y in invisibility like short i
Moved to The Game Room from Cafe Society.
“Abracadabra” has five a’s. (It probably started off as a joke word.)
Why not indivisibility?
defenselessness
peewee
voodoo
syzygy
bonobo
bikini
serene
muumuu
Well, I do, but then again, English is not my mother tongue 
taramasalata
Mississippi (though defenselessness is longer).
heebee-jeebees.
usufruct
Dependence.
Strengthnesslesses
Darth Vader: “Noooooooooooooo!”
Motorsports
Stormfronts
Dumptrucks
Alabama has to have the highest single vowel/consonant ratio.