The words "lines nest" can be replaced by several synonyms that can carry the same or a different meaning depending on the context in which they are used. Some of the synonyms for this phrase include entwine, interweave, intertwine, braid, tangle, mesh, knotted, latticed or even convolute. These words refer to the twisting or coiling of more than one line or object to create a tangle-like structure. They can be used to describe natural elements like vines, or human-made structures like ropes. Using synonyms can help to create more depth and interest while describing objects or events in a piece of writing.