Word Study
childishness
CIDE DICTIONARY
childishness, n.
The state or quality of being childish; simplicity; harmlessness; weakness of intellect. [1913 Webster]
THESAURUS
childishness
anility, babyishness, boylikeness, caducity, callowness, childlikeness, decline, dotage, dotardism, girlishness, immaturity, imprudence, inadvisability, inattention, inconsideration, indiscreetness, indiscretion, inexpedience, infantilism, injudiciousness, irrationality, maidenliness, pompousness, puerilism, puerility, reasonlessness, recklessness, second childhood, senectitude, senile debility, senile dementia, senile psychosis, senile weakness, senilism, senility, senselessness, stuffiness, thoughtlessness, unintelligence, unreason, unreasonableness, unsensibleness, unsoundness, unthoughtfulness, unwisdom, unwiseness, witlessnessFor further exploring for "childishness" in Webster Dictionary Online