Asininity is a related term of childishness.
In uncountable|lang=en terms the difference between asininity and childishness
is that asininity is (uncountable) the quality of being asinine; obstinate stupidity while childishness is (uncountable) the state or characteristic of being childish.
In countable|lang=en terms the difference between asininity and childishness
is that asininity is (countable) an asinine remark, behaviour, etc while childishness is (countable) childish behaviour.
As nouns the difference between asininity and childishness
is that asininity is (uncountable) the quality of being asinine; obstinate stupidity while childishness is (uncountable) the state or characteristic of being childish.
asininity
English
Noun
(uncountable) The quality of being asinine; obstinate stupidity
(countable) An asinine remark, behaviour, etc.
childishness
English
Noun
(uncountable) The state or characteristic of being childish.
(countable) Childish behaviour.
See also
* puerilism
* puerility