ahead vs though

ahead

• To a later time. 

• At an earlier time; beforehand; in advance. 

• To an earlier time. 

• In or for the future. 

• At or towards the front; in the direction one is facing or moving. 

• So as to be further advanced, either spatially or in an abstract sense. 

though

• Despite that; however. 

• Used to intensify statements or questions; indeed. 

• Despite the fact that; although.