Flashcard killers: diao4qian3 and pai4qian3

Earlier I wrote about Supermemo, my favorite flashcard program. I use it to manage 6342 vocabulary terms and a large number of other items. Sometimes, though, there are words that are just hard to use with flashcards, because it is difficult to differentiate them. Today I got both diao4qian3 and pai4qian3 wrong. I got these words from reading the news at VOA. The Wenlin definition for diao4qian3 is "dispatch; assign", and the definition for pai4qian3 is "send; dispatch". There isn't really a whole lot of semantic difference between these two words. I suspect I may need to fold them into the same flashcard, unless I can figure out how the words are different.