William S. Gilbert was an English playwright, librettist, and poet who is best known for his collaboration with composer Arthur Sullivan. There are many synonyms that could be used to describe Gilbert, such as words that denote his role as a writer, his nationality, or his artistic style. Some possible options might include "English dramatist," "Victorian poet," "comic writer," or even simply "Gilbert and Sullivan collaborator." Regardless of the terms used, it's clear that Gilbert left an indelible mark on the world of theater and literature, and his witty, satirical works continue to be enjoyed by audiences today.