Although ,Though,Even though, As though

Although ,though,even though all mean the same thing with subtle differences ,not in meaning ,though.

Though is more common in informal style.

Even though is a stronger form of although.

- Although/Though/Even though he played brilliantly, he still lost her match.

Though like however,nevertheless and all the same can appear at the end of a sentence as an adverb,but not although or even though.In this use ,it means however.

- He lost the match,he played brilliantly, though.
- I enjoyed the movie,though, I thought It was too long.
- The strongest argument,though is economic and not political.

Though can be used after an adjective,either.

- Tired Though he was,he stayed up until midnight.
- Hard though I studied,I failed in my test.
- tempting though the snacks were,I refused to eat them.

But as though means differently.It means as if.

- She treats him as though he were her son.

For more information about "though" click here.