A costume ball would be a type of gala, but a costume itself is not. A novice is someone new to an endeavor. A competitor might be a novice, but a novice is not usually considered one of several types of competitors. But the word play is too general. You can play a game without trying to make the game respond in a certain way.
Indigence means poverty.
Dormancy means inactivity, but it not necessarily require concealment or hiding. Exposing something that is dormant does not necessarily cause the dormant thing to become active. Departing, not arriving, reverses presence. Buoyancy is the ability to float. But knowing is not an act done to someone else in order to correct ignorance.