The word "tridimensional" can be replaced by a variety of synonyms depending on the context in which it is used. Some common alternatives include "three-dimensional," "3D," "spatial," "volumetric," "depthed," and "cubical." These words all refer to objects or spaces that have three dimensions - length, width, and height - and are often used in the fields of art, design, and technology. In certain contexts, synonyms like "solid," "realistic," and "tangible" may also be used to describe tridimensional objects or concepts. Overall, the use of synonyms for "tridimensional" can add nuance and variety to language and improve communication.