"Cast a glance" is a commonly used expression that means to take a quick look or glance at someone or something. If you want to vary your vocabulary, there are numerous synonyms that you can use instead of "cast a glance." Some alternatives include "take a peek," "glimpse," "observe," "peer," "survey," "inspect," "eye," "examine," "scrutinize," "check out," "scan," and "peruse." Each of these synonyms conveys a slightly different meaning, so you can choose the one that fits the context best. By using a range of synonyms, you can enhance your writing and avoid repetitive language.