Childishness, childness.

Childishness.

Childishness. Obsolete.

With reference to a person who is no longer a child: quality or conduct not befitting maturity; puerility, foolishness, silliness.

The quality of being (unduly) childish; babyishness.

As a mass noun. Usually derogatory. Behaviour, conversation, thought, etc., befitting children rather than adults; childishness; immaturity…

Childish humour, childishness. Obsolete. rare.

= puerility, n.

The state of being a baby; the time of life during which one is a baby. Also figurative: the earliest period of something.

The fact or quality of being babyish; excessive childishness.

Behaviour, thought, or attitudes not befitting or characteristic of a mature person; childishness.