The siddur and macḥzor are the two principal types of Jewish prayer books.
Siddur from a Hebrew root meaning "order", refers to the prayer book generally used through the course of the year. The "complete" siddur will contain prayers for weekdays and Shabbat, for lifecycle events like weddings and circumcisions, and for most major and minor Jewish holidays. Less than "complete" editions, such as weekday-only or Shabbat-only siddurim, can also be found readily.
Machzor (also maḥzor or mahzor), from a Hebrew root meaning "cycle", refers to prayer books containing the prayers for the major holidays of the year. This term is most often encountered as referring to prayer books for the High Holy Days, Rosh Hashanah and Yom Kippur. The unique prayers of these days are so extensive that they are almost never found in standard siddurim.
There are maḥzorim for the Three Pilgrimage Festivals (Passover, Shavuot and Sukkot), although prayers for those days can also be found in the standard siddur. Note that the term machzor originally referred to a book containing prayers for the entire year, including weekdays and Shabbat as well as holidays.[1]
Other books exist for specialized Jewish prayer purposes: