You can make 325 anagrams from letters in passacaglia (aaaacgilpss).
1650-60; pseudo-Italian spelling of earlier passacalle Spanish pasacalle literally, step (i.e., dance) in the street (pasa 3rd singular present of pasar to step, pace
Besides these there are the three great independent toccatas and the passacaglia.
Dance-measures, the passacaglia, even the jig, are not excluded; and a chorale has its counterpoint in a siciliano.
These sonatas and the passacaglia were written for his young son, W. Friedemann, to practise on the pedal clavichord.