practical joke – n. a joke involving something that is done rather than said : a trick played on someone

pretend – v. to act as if something is true when it is not true

kid – v. to speak to (someone) in a way that is not serious : to say things that are not true to (someone) in a joking way

deceive – v. to make (someone) believe something that is not true

denial – n. a condition in which someone will not admit that something sad, painful, etc., is true or real

awkward – adj. not easy to deal with