The word "sneakthief" often refers to someone who steals in a stealthy, sneaky manner. However, there are other words that can be used to describe a person who engages in this illegal activity. Some synonyms for "sneakthief" include "pickpocket," "thief," "burglar," "shoplifter," "purloiner," "cat burglar," "larcenist," and "filcher." Each of these words carries its own connotations and nuances, and can be used depending on the specific type of stealing or the level of stealth involved. It's important to choose your words carefully when describing someone who commits these acts, as the language you use can have significant impact on how the person is perceived by others.