^ "Coupled with" makes sense. I honestly don't know, so.
;;
From what I know...
A-side: A single that is featured with one main song (i.e HEAVEN, CAROLS, Moments).
B-side: A new song featured on a single, but not in the title (i.e theme of a-nation '03 from &, Will on HEAVEN, Beautiful Fighters on BLUE BIRD, etc).
Double A-side: A single in which two songs are featured (i.e Bold & Delicious/Pride, Startin'/Born To Be..., STEP you/is this LOVE?).