Gonorrhea.
Bulbous Bouffant
Blubber
Macadamia
Latrine
Anathema.
Mistral (a dry, cold wind)
Veruca.
tyranny (a favorite for years)
And, in honor of George Costanza:
Manure.
Melena. It just sort of flows off the tongue and sounds like it should be a woman’s name (I think I’ve even heard of it being used as such). Except, it means bloody feces.
Bwahahaha - I actually have a friend named Alexia. Should I tell her about this?
Ah, who am I kidding? We all know I will. 
Gazebo.
It’s even more so with grotesquerie.
Tourette Syndrome. It sounds like a diabolocal urge to ballet dance.
“Atrocious” is a very pretty word, to me.
Well, there is what I would love to name a kitten if it didn’t mean what it does: Skanky.
It just strikes me as a cute, kitteny-sounding word, but I can never use it.
Lubrication.
Melanoma
And then there’s Candida Royalle, the porn star. Seriously, you want people to think of yeast when they think of you?
Say lavatory door with a Antonio Banderas accent.