Synonyms for Expound (same or very similar meaning)
WordNet sense 1 (state):
exposit, set forthWordNet sense 2 (add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing):
dilate, elaborate, enlarge, expand, expatiate, lucubrate, elaborate, flesh outFrom the ODE community, based on WordNetadd/edit