There are a variety of synonyms that can be used to describe a beaver's lair, which is the place where these industrious rodents live. One common term is "beaver lodge", which refers to the domed structure made of sticks, branches and mud that beavers build to serve as their home. Another synonym might be "beaver den", which suggests a smaller, more compact space where the animals live. Other possible ways of describing a beaver's lair might include "beaver burrow" or "beaver sanctuary", both of which convey a sense of safety and protection that these structures offer to the creatures that live inside them.