although

In many uses although and though are interchangeable, but though is generally more versatile, in that it can occupy different positions in a sentence with more grammatical flexibility. It is the only choice in the phrases as though and even though, and in the following types of uses: I don't like them, though.It is true, though, that they have been kind to us.The chair, though damaged, could still be used.We enjoyed the day outside, cold though it was.

Do not use the conjunction although as a substitute for the adverb however. However is used to add contrasting and surprising information, and, unlike although, is followed by a comma when it is used as a conjunction, e.g., We were from different backgrounds. However, we got along really well. and We got along very well, although we were from different backgrounds.