The term 'Last of a Series' can be represented by several words, including OMEGA (5 letters), Ender (5 letters), ZED (3 letters), NTH (3 letters), and ZEE (3 letters). OMEGA is the last letter of the Greek alphabet, signifying the end of a series. Ender is another word for the last or final person or thing in a series. ZED is the British spelling of the letter Z, which is the last letter of the English alphabet. NTH is an ordinal number used to indicate the last item in a series. Finally, ZEE is another way of spelling the letter Z. All of these words represent the concept of being the last of a series.