Brown Driver Briggs

 1. that, for, because, when, as though, as, because that, but, then,
certainly, except, surely, since
  1) that
1a1. yea, indeed
  2) when (of time)
1b1. when, if, though (with a concessive force)
  3) because, since (causal connection)
  4) but (after negative)
  5) that if, for if, indeed if, for though, but if
  6) but rather, but
  7) except that
  8) only, nevertheless
  9) surely
  10) that is
  11) but if
  12) for though
  13) forasmuch as, for therefore