There are a variety of synonyms for the word "restrict", each with a slightly different connotation. One of the most common synonyms is "limit," which implies a boundary or a cap on something. Another synonym is "constrain," which suggests that something is being held back or inhibited. "Regulate" is another synonym, which has a more positive connotation and suggests that something is being controlled in a way that is beneficial or necessary. "Curtail" is another synonym, which suggests a reduction in something that was previously larger or more expansive. "Censor" is a synonym that suggests someone is controlling the access or dissemination of information.