A monogram is a motif made by overlapping or combining two or more letters or other graphemes to form one symbol. Monogram PTS. is an acronym for the five letters 'PTS.' which can be arranged in various ways to create a unique design. The two crossword solutions, INITS. (5 letters) and LTRS. (4 letters), refer to the number of letters used to create the monogram. INITS. stands for Initials, which are the first letter of each word in a phrase, while LTRS. stands for Letters, which are all the letters in a phrase.