Here are two words that I keep getting confused and it is not so funny to misuse these.
das Mitleid - pity, charity, mercy
das Beileid - condolences, commiseration
das Leid - harm, suffering, distress, sorrow
I always want to use Mitleid, but I never seem to remember it until I say Beileid, get a weird look and then realize, oops I mean Mitleid.
Beileid is really only used when someone dies. That is what I am repeatedly reminded by people when I misuse it. I don't use these words that often. I seem to forget every time!!