A rubber stamp is a device used to quickly and easily create an imprint on a document or other surface. The term 'rubber stamp' can refer to the device itself, or to the imprint it creates. The crossword solutions for the term 'rubber stamp' are APPROVER (8 letters), OKAY (4 letters), AFFIRM (6 letters), YESMAN (6 letters), and ENDORSE (7 letters). An approver is someone who has the authority to approve something, such as a document or request. OKAY is an informal way of expressing agreement or acceptance. To AFFIRM is to state positively or confirm something. A yesman is someone who always agrees with their superior or boss. To ENDORSE is to publicly support or approve of something.