A series of three novels, movies, etc., that are closely related and involve he same characters or themes

A period of three months; one of three periods into which a school year is sometimes divided

A fishing spear that has three points and that looks like a large fork

A flat shape that has four sides and four angles

A group of four singers or musicians who perform together

A US customary unit of measurement for liquids; 4 quarts equals a gallon

A flat shape that has five sides and five corners

A shape that is like a star with five points formed by five straight lines

One of five babies that are born at the same time to the same mother