another good word: nonmonotonic
it is officially The Worst Word to type on a flip phone, since it has seven contiguous letters on the same key (and then another set of two contiguous letters on that same key again, but with a t in between)
@Felthry Time to play morse with your phone!
@Felthry nonmononomicon
@Felthry in German the same phenomenon occurs in Alleinwohnung (single occupancy flat)
other words that start with nonmono- work too. nonmonogamous, nonmonotheistic, etc