The term 'WORD WITH 'REASON' OR 'REACH'' is a six-letter word that contains either the word 'REASON' or 'REACH'. This term could refer to several words, such as 'REASON', 'REACH', 'reasoned', 'reached', 'REASONER', and 'reacher'. All of these words have to do with the idea of understanding or achieving something. For example, 'REASON' is used to describe the process of thinking logically and coming to a conclusion, while 'REACH' is used to describe the act of extending one's arms or resources to obtain something.