They are fun to say. I enjoy calling them tasty words.
Aristotle
Banana
Cougars
Diphthong
Electromagnetism
Fuse
Gargantuan
Herd
Ignatius
Judo
Kernel
Lopsided
Melancholy
Nefertiti
Ocular
Porkchops
Quail
Rambunctious
Sourdough
Titicaca
Ushered
Vernacular
Whistle-Pig
Xena
Yodel
Zonked
I Pity The Blog 
I love saying the word “cougar”.
I like “polyisocyanurate.” Takes practice, but it blows people away in casual conversation.
I always thought “filth” was pretty good for a short on. For something longer, I submit Sidney Greenstreet from The Maltese Falcon:
“Talking is something you can’t do judiciously unless you stay in practice.”
It takes practice to say that line as well as he did.
Кстати, по радио программа была об этом. Не помню, правда на какой волне…
Спасибо за Ваш труд!!
Круто, спасибо! 😉
I always included “amplitude” in this category. Of course, Shriekback got me stuck on “parthenogenesis.”
Try “moikka”… where the fuck are you?