Bird's-nest is a term typically used to describe a bird's dwelling or a structure resembling one. However, the word "bird's-nest" can also have several synonyms that can be used to express the same meaning. Some of the synonyms for bird's-nest include "nestling place," "domicile," "den," "roost," or "shelter." Other synonyms for bird's-nest include "habitat," "refuge," "retreat," "lodge," or "burrow." These words can be used interchangeably, depending on the context of the sentence. Whether describing an actual bird's home or describing a human dwelling or structure that resembles one, these synonyms can add variety and depth to one's writing.