A 'word on a wanted poster' is typically an ALIAS or pseudonym used by a criminal, along with a REWARD offered for information leading to their capture. The crossword solutions for this term are ALIAS (5 letters) and REWARD (6 letters). An ALIAS is a false name used by someone to hide their true identity, while a REWARD is a sum of money offered as an incentive for providing information that leads to the apprehension of a criminal.