Rationalize is a term used to describe the process of providing a logical explanation or justification for something. It can be used to EXPLAIN or JUSTIFY an action, decision, or belief. The term can also be used to describe the process of making something more reasonable or logical. The crossword solutions EXPLAIN and JUSTIFY are both related to rationalizing. EXPLAIN means to make something clear or understandable by describing it in detail, while JUSTIFY means to provide a valid or acceptable reason for something. Both terms can be used in the context of rationalizing.