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Vivace
A lively, brisk tempo, somewhat faster than Allegro.
Prestissimo
As fast as possible.
Andantino
Usually, a tempo slightly faster than Andante but slower than Allegretto (but occasionally, slightly slower than Andante is meant).
Allargando
Slowing down, becoming broader and sometimes also louder.
Ritenuto
Immediately slower, held back. Also, riten.
Tempo
Time, rate of speed. Also, (pl.) tempi.
A Tempo
Return to the original tempo.
Maestoso
With dignity, nobly. Also, con maesta.
Alla Marziale
To the Martial, military.
L'istesso
At the same tempo. Also, lo stesso tempo.