"Ablegate" is a seldom-used term that refers to an ambassador or envoy. If you're searching for a synonym for this word, there are a number of options that might be better suited to your needs. For instance, you might use the word "diplomat" to describe someone who represents a country abroad. Alternatively, you could use "emissary" or "envoy" to suggest that the individual in question has been sent on a particular mission. Other words that could serve as synonyms for "ablegate" might include "delegate," "representative," or "delegate-in-residence." Whatever your writing needs, there are plenty of words out there to help you find the best way to express your meaning.