When trying to come up with synonyms for "weigh up," several phrases come to mind that have similar meaning and usage. "Consider" is a prime example, as it has a similar connotation of evaluating options or ideas carefully before drawing a conclusion. "Assess" is also commonly used, particularly in professional or academic settings, to describe a process of evaluating evidence in order to draw conclusions. "Evaluate," "examine," and "scrutinize" can also be used as synonyms for "weigh up." All of these phrases describe a process of taking a closer look at something and using critical thinking to come to an informed decision or conclusion.