The word "swiz" is a slang term used in British English to describe a deceitful or fraudulent act. There are various synonyms for this word that can be used to convey a similar meaning. Some of the most common alternatives include "scam", "fraud", "swindle", "cheat", "deception", "hoodwink", "trickery", and "deceit". These words can be used in various contexts to describe situations where someone tries to deceive another person for their personal gain. So, next time you come across the word swiz, you can use any of these synonyms to express the same meaning with precision.