Find a five letter word that can be placed behind each of these words:
1) Boiling
2) Check
3) Pin
4) View
Try another one:
1) Bill
2) Card
3) Side
4) Skate
And the last one:
1) Fire
2) Rain
3) Sound
4) Water
The answer for the first group is
point
Second one:
board
Last one:
proof (not sure ...)
Last one(possibly)
proof
Though
rainproof is a bit uncommon.