"Fifty-seven years in this business, you learn a few things. You know what words are funny and which words are not funny. Alka-Seltzer is funny. You say 'Alka-Seltzer', you get a laugh... Words with 'k' in them are funny. Casey Stengel, that's a funny name. Robert Taylor is not funny. Cupcake is funny. Tomato is not funny. Cookie is funny. Cucumber is funny. Car keys. Cleveland... Cleveland is funny. Maryland is not funny. Then, there's chicken. Chicken is funny. Pickle is funny."
Booger Mountain, North Carolina. Known for Christmas trees; their marketing campaign is "Always Pick a Booger!"
Comedy
On Monty Python's Previous Record, Dr. Carl Gruber goes through words on which he gauges embarrassment levels: "Shoe. Megaphone. Grunties." And even ruder: "Wankel Rotary Engine."
Joker: What is it about the sombrero? Some words are just naturally funny.
Literature
According to Dave Barry, "doot", "weasel", and "Smoot-Hawley Tariff".
I'm at home, sitting in front of my computer in my underwear, trying to decide which animal name is funnier, 'hamster' or 'gerbil.'" ("Answer: 'weasel.'")
Live-Action Television
It's Always Sunny in Philadelphia, a show known for its willingness to use the word "shit", has an episode in its fourth season called "Who Pooped the Bed?", where "shit" is scarcely used. Lampshaded, even.
George Carlin once did a routine where he talks about foods he can't eat because they have funny names. "I can't eat *snicker* bananas. And I could never eat *suppressed guffaw* kumquats!"
The Nostalgia Critic: "Lettuce' is not funny. 'Cabbage' is freaking hilarious. Just watch: lettuce (silence), cabbage (laugh track). Works every time."
Trollvorlord: You must be pl0xin' me. Pinkie Pie (From an alternate reality): Why does that make me laugh?
The inherant hilarity of "gurt" is a Running Gag in Echo Chamber; it starts when Ace makes a video about portmanteaus, including separating "yogurt" into "yo" and "gurt". He keeps cracking up whenever he says "gurt", and later the word merely being mentioned is the only thing to get Mr Administrator to laugh, leading to the first time we see more of his face.
In one episode of Garfield and Friends, Garfield takes the viewers through a lab to show them how humor is created, including listing out some words that are inherently funny.
The song "John Jacob Jingleheimer Schmidt". Supposedly the reason for the long name is that the song's writer thought German-esque words were inherently funny.
