Nincompoop vs. Ninnyhammer

Nincompoopnoun

(derogatory) A foolish or silly person.

Ninnyhammernoun

a foolish person; a simpleton

Nincompoopnoun

A fool; a silly or stupid person.

‘An old ninnyhammer, a dotard, a nincompoop, is the best language she can afford me.’;

Ninnyhammernoun

A simpleton; a silly person.

Nincompoopnoun

a stupid foolish person