NO RHYME

I've heard there is a word
For which there is no rhyme
I've thought that I should have a go
To try from time to time

To find a match that fits
A partner for this word
If it was in a thesaurus
I figure I'd have heard

Yahoo! My search is done
A word that rhymes with ORANGE
I know! I've got it! What a find!
I'm sure you've guessed it's _______

LISTEN TO ME READ

I just had to do it. It was calling to me, but I do apologize. It's sort of like singing seven out of eight notes in a scale...