Unless it has to be phonetically perfect, I don't see why you can't rhyme;
purple - swiral, girl, whirl, furrow, burrow.. the last two are stretching it a bit.
Orange - Thorn, Corn, Born, Sworn, Storm.
It was a dark dark day, some might say purple,
It started to rain, and I had to pick up my girl.
My ford tempo refused to start, what an orange.
And then it started raining, man what a storm!