Aciculated is a word often used in scientific and medical fields to describe something that has a sharp, needle-like structure or shape. However, there are several synonyms for aciculated that can be used interchangeably. One synonym is spiky, which refers to something that has sharp points or spikes, such as a cactus or thorn bush. Another synonym for aciculated is prickly, which can be used to describe things that have small, sharp protrusions or thorns. A third synonym is pointed, which refers to anything that has a sharp or tapering end, like the tip of a pencil or the edge of a knife.