explicate, formulate, develop -- (elaborate, as of theories and hypotheses; "Could you develop the ideas in your thesis")
invent, contrive, devise, excogitate, formulate, forge -- (come up with (an idea, plan, explanation, theory, or principle) after a mental effort; "excogitate a way to measure the speed of light")
give voice, formulate, word, phrase, articulate -- (put into words or an expression; "He formulated his concerns to the board of trustees")