Sometimes in songs or poetry we are set-up to expect a rhyming word but instead another word is supplied. An example is the Killers song Mr Brightside:
Now they're going to bed.
And my stomach is sick.
And it's all in my head.
But she's touching his chest
To my recollection I've heard these called several different things in the distant past.
So what are these anticipated but missing rhymes (or the works that contain them) called?