When searching for synonyms for the word "illuminable", it is essential to consider alternative terms that convey the same meaning. A suitable synonym for this word could be "lightable", which denotes the ability to be illuminated or lit up. Another option could be "brightenable", emphasizing the capacity to be made brighter or radiate light. Additionally, "illumining" may be used to describe the act of illuminating or providing light. These synonyms offer alternative choices while retaining the concept of illuminating or shedding light upon something.