'paeony' is spelt 'peony' and neither end in aeon/eon

Good grid, but you need to correct 'end' to 'contain' in your definition of the paeony group.

@mal paeony is the original unamericanised spelling. Thanks for pointing out that I made a mistake in wording my link though- in should have said 'contain' not 'end in'. It would have accepted a valid answer anyway, so made no difference to points earned.