Witlessness is a related term of childishness.
As nouns the difference between witlessness and childishness
is that witlessness is the state of being witless; stupidity while childishness is (uncountable) the state or characteristic of being childish.
witlessness
English
Noun
(-)
The state of being witless; stupidity
Anagrams
*
childishness
English
Noun
(uncountable) The state or characteristic of being childish.
(countable) Childish behaviour.
See also
* puerilism
* puerility