"drain" - key terms from Wikipedia

brain drain
cocaine drain
common drain
currency drain
data drain
down the drain
drain
drain	and source
drain	current
drain	deimos
drain	free
drain	intervals
drain	pipe
drain	point
drain	the life
drain	to source voltage
drain	voltage
energy drain
extended drain
external french drain
flood and drain
french drain
gate to drain
including those that drain
maximum drain
open drain
pool drain
river systems that drain
septic drain	field
source and drain
source to drain
storm drain