Desecration smile refers to an insincere or fake smile that is used to cover up a person's true feelings or intentions. Some synonyms that can be used to describe such a smile include a deceitful smile, a falsified smile, and a sly smile. Other words that can be used to describe this deceptive behavior include disingenuous, insincere, and hypocritical. These are all words that typically describe someone who is not being honest about their true feelings or intentions. By being aware of these synonyms, it can be easier to spot when someone is using a desecration smile and to guard against being fooled by it.