There are several synonyms for the phrase "steal a glance/look" that you can use to add variety to your writing. Some of these include "glimpse," "peek," "spy," "ogle," "observe surreptitiously," and "caper." Each of these synonyms carries a slightly different connotation, so choose the word that best fits the context of your sentence. For example, "ogle" might work well if you want to convey a sense of longing or desire, while "spy" might be more appropriate if you want to suggest that someone is being sneaky. Using these synonyms can help spice up your writing and make it more engaging for readers.