Those two words are "death" and "kill." But leave it to me to find a way to work those two words into two different sentences.
The Setting: My friend's husband's funeral (he was in his early 30's. He died from cancer....this was years ago.)
The Scene: Receiving line with my friend and all of her close relatives in line.
My friend to me: (I'll change her daughter's name here for their privacy) "Kelly just adores Amanda (my daughter)."
Me: "Oh, the feeeling is mutual! Amanda loves Kelly to death!" (in my head I'm shouting at myself "WTF was that?!!!!!!!!")
My friend: "We'll have to have her over for a sleepover one night."
Me: "Amanda would KILL to be able to sleep over with Kelly!"
I walk away with an oft repeated refrain to myself playing in my head: "I am such a loser."