Many’s the English word that has no single perfect rhyme: ‘orange’ is probably the most famous, or ‘month’. (Actually, I have a rhyme for month, but it requires a lisp and is too filthy even for the internet.)
So here’s ‘chimney’:
The girls are sitting, prim, knees together,
hands on laps.
The boys all smoke like chimneys,
and look in vain for gaps.