Photo-montages are composite images that combine multiple photographs into a single piece of art. If you're looking for synonyms to describe this artistic technique, there are several different options available. One term you might use is "collages," which similarly combines different images into a single composition. Another possible synonym is "composite images," which describes how multiple photos are blended together to create a unified whole. Other options might include "mashups," "fusions," or even "synthetics" to describe how disparate elements are brought together to create something unique and new. Regardless of the term you choose, photo-montages are a powerful tool for artistic expression and storytelling.