Comment by mcv

I love the list of vowel-heavy words. You can also construct some similar words in Dutch. Or at least you used to before 1996, when a spelling change introduced hyphens into many of these:

  zeeëend - sea duck, or Velvet scoter (nowadays "zee-eend")
  koeieuier - cow udder (nowadays "koeienuier")
  zaaiuien - seed onions (still legal I think)
  kraaieëieren - crow eggs (nowadays kraaieneieren, I think)

We also have the opposite:

  angstschreeuw - cry of fear
  slechtstschrijvend - worst writing

These are fairly normal words. With a bit of creativity, you can make some that are much worse:

  borsjtsjschrokkende - borscht gorging
  haaiaaioorkonde - shark petting certificate
  weggooiooien - throw-away ewes