i Register
In some senses, nestling is marked as obsolete. Watch for register when choosing this word.
noun
A small, young bird that is still confined to the nest.
A nest; a receptacle.
[…] the Secrecies of the Paſſages; and the ſeats or neaſtling of the humours; […]
noun
The act of one who nestles.
It was associated, to them, with vague sweet memories of loving nestlings in mother's arms, of soft warm coddlings before the fire, of slow rocking to and fro in the little, low, flag chair, and gradual droppings off to sleep […]