There is at least one word that can follow POUNCES.
There are at least two words that can follow cupstone (i, r).
Actually there are at least four words that can follow CUPSTONE. Add an A, a C, an I, or a K. (I didn't get anywhere with R.)
Oh, and conepatus is a genus of skunks (for those inquiring minds).
Other words that could have followed trowel were elfwort, felwort, low-rent, woolert, plowter, trowels, and wrostle.
There is at least one word that can follow ROWLETT.