Oh no, not the poop game.
Stop or my Mom Will Poop
Crouching Tiger; Hidden Poop
A History of Poop or perhaps A Poop of Violence
Sorry in advance…
Two words I find funny:
Canoodle
Sesamoid
Rhubarb! I was trying to remember rhubarb! That was one of them, totally!
My son used to have this cool pc program called KidWorks deluxe that would let you write a book, illustrate it, and then it would print it out so that you could fold the pages up into a little book – it was real cool. When you finished the story, it would read it back to you out loud, in a bug voice.
Anyway, one feature was these virtual stickers. Wherever you put these stickers, the program would read it back as a word in that funny atonal computer speech – you know, it sounded sorta like Stephen Hawking. So we used to make these little tone poems:
“bird bird bird bird pelican pelican bird bird bird bird pelican pelican
bird bird bird bird nest nest eagle nest eagle nest vulture vulture
penguin penguin vulture vulture
penguin penguin vulture vulture
bird bird bird bird pelican…”
Maybe you had to be there, but we would always fall out laughing. Still do, if one of us says “bird bird bird bird.”
Thanks for the happy memory, Zsofia!
Geoduck
Zinc. Puerile. Enjambment. Spongiform. Quidnunc. Cassowary. Farthing.
Emu!
antidisestablishmentarianism
Worcestershire sauce.
A Zen cutter.
Swoop!
befuddle
Badger!
Spelunker.
Especially when used on the less literate:
Me: “Why you… you… SPELUNKER!!”
Them: 
vibraphone
Wankel rotary engine
Bilabial Frickative.
(don’t get all excited - it’s just a Bronx Cheer)
wainscotting
spleen
matriculate
Walla Walla
Cucamonga
chicken
chicken
chicken
chicken
chicken
chicken
Philately.
Fricassee. Fracas, foible, falferol, fandango. Frou-frou.
Spatula.
Superdelegate. I’m not counting whatever amusement one might derive from imagining politicians with heat vision, the power of flight or telekinesis or whatever. It’s just fun to say. If you say it fast, it sounds kind of Asian, like something Godzilla might battle.