1. (n.) The quality of being puerile; childishness; puerileness.

2. (n.) That which is puerile or childish; especially, an expression which is flat, insipid, or silly.

babyishness boylikeness callowness childishness childlikeness girlishness immaturity imprudence inadvisability inattention inconsideration indiscreetness indiscretion inexpedience infantilism injudiciousness irrationality maidenliness pompousness puerilism reasonlessness recklessness senselessness stuffiness thoughtlessness unintelligence unreason unreasonableness unsensibleness unsoundness unthoughtfulness unwisdom unwiseness witlessness