As inspired by a friend of mine who has such a list.

• alabaster
• cling, clung (mostly the latter)
• nugget, nougat (or any other form thereof)
• blimp
• zit
• zap, zapped (please, just use shocked. it's okay if you're saying something odd like "zip zap zoop," but only then)
• most modern onomatopoeia words (these are really only permissible in comic books (in my opinion), thank you very much)
• chunk
• clump
• teat, tit
• "cray" (as in "crazy"- this annoys me to no end, really)
• I love the word twilight, and detest its recent association with vampires and poor writing
• "haters"