Cantrap is a word that is not frequently used nowadays, but it refers to a charm, spell, or trick that is often used with the intention of deceiving someone. There are various synonyms for cantrap that can be utilized to convey the same meaning, such as ensnarement, deception, sleight of hand, hoax, delusion, or mirage. Other synonyms for cantrap include chicanery, stratagem, deceit, subterfuge, skulduggery, and artifice. All these terms have one thing in common, and that is they refer to methods of tricking or misleading someone. So, if you want to describe something that seems too good to be true, and you suspect there might be a hidden catch, you could use any of these synonyms to describe it.