The tongue radical and the tongue kanji are exactly the same! Yee-haw!
You’re sound asleep in bed when your tongue drops out of your mouth and you start to drool, getting saliva all over the bed sheet (した). You wake up with a soggy patch of sheet near your mouth and wipe the drool off your face. Your significant other sees the whole thing.
Currently there are no similar looking kanji which exist in the WaniKani learning system