The best replacement for though is although.

The best alternatives to though are rated as following:
★★★★★  although
★★★★  tho
★★★  thou
★★  even though
★★  however
★★  but
★  while
★  even if
★  although grammar
★  thought
★  though
★  eventhough
★  as if
  although usage
  like
  despite
  although use
  tough

Your alternative for though is not listed? Suggest!
Speaking about though, one probably shouldn't forget about comma.

Other search terms related to though and their ratings are:
★★★★★ comma
You have in mind a companion for though and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of though in all years. Click on graph for more.
though
although
tho