Spill
れい
こぼ
None
You get rain orders. Your orders are to make sure there is zero spill.
The best way to make sure there is zero spill when it rains is to get rid of the rain. You use a special ray (れい) gun and zap the rain right out of the sky. There will be zero spills because there will be zero rain.
Currently there are no similar looking kanji which exist in the WaniKani learning system