Note: The conjunctions although and though are generally interchangeable. You should use though, however, when it’s used to form an elliptical clause or to join other parts of speech. See the examples below.
Example: Although the supervisor was sympathetic, she refused to let the accountant take additional maternity leave.
Example: Though a fair main, the CEO required us to work overtime. (An elliptical clause.)
Example: This harsh, though predictable, outcome destroyed his credibility. (Linking the adjective predicable to the adjective harsh.)