Crusader,
I tend to use the term “Liturgy” even in reference to the Mass because it is, IMNSHO, more precise. The term “Mass” derives from the dismissal at the end of Mass in Latin (Ite, missa est). The term “liturgy” was in use long before the term “Mass” arrived on the scene. Also, the term “Liturgy” indicates that the Mass is “the work of the people” (from the Greek *laos *(people) and *ergon *(work). This is not conveyed or connoted by the term “Mass” which suggests something that the priest does for the people.
However, at the same time, you are quite correct that there are other liturgies besides the Mass, not just in the Latin Rite, but in all Rites.
It seems that there is no end to the possible ways to confuse
Deacon Ed