Today I noticed a bunch of interesting words, mostly nonsense, that all begin with the letter "h":
hanky panky, helter skelter, hoodoo gurus, hodge-podge, Hunca Munca (a character from a Beatrix Potter story), harum scarum, hokey pokey, hoity-toity...
And then of course a Google search led me to this page and this page and this page, where I found a bunch more. Lots more H words: heebbie-jeebies, hee-haw, higgledy-piggledy, hip-hop, hocus-pocus, hoi-polloi, hoochie-coochie, hurdy gurdy, and so forth.