PROLONG is a playable word

prolong Scrabble® Dictionary

verb
prolonged, prolonging, prolongs
to lengthen in duration
47 Playable Words can be made from "PROLONG"
   2-Letter Words (7 found)
   3-Letter Words (14 found)
   4-Letter Words (18 found)
   5-Letter Words (6 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)