"Sneaking out" is a phrase that means leaving a place or situation secretly or surreptitiously. There are several synonyms that can be used to describe this act, such as "slipping away," "escaping," "slinking out," "creeping out," "stealing away," and "absconding." Each of these words conveys a slightly different nuance of the act of leaving secretly. "Slipping away" suggests a smooth exit, while "escaping" has a connotation of breaking free from confinement. "Slinking out" and "creeping out" suggest a furtive, stealthy departure, while "stealing away" implies a clandestine exit. "Absconding" suggests a more serious departure, with the implication of leaving without permission or with ill intent.