Telespectroscope is a rare term that refers to an instrument used for observing distant objects or remote areas. There are a few synonymous terms that can be used instead, including telescope, binoculars, periscope, and spyglass. These instruments are commonly associated with astronomy, birdwatching, and military operations, respectively. However, they all share the common feature of enabling the viewer to observe an object from a distance. While Telespectroscope may not be a widely known word, it's good to know that there are alternative terms that can be used depending on the context.