Hmm... do you mean an individual object or two that go together 'in harmony'?
Anyway, if you mean an individual object, I suppose the object could be water, or a lake/pond/river/steam-these are very harmonic, peaceful. Or even a waterfall or stream. Perhaps you could choose a palm tree, or a musical instrument- you could explain that this is harmonic in the literal sense too, as it provides a harmony. If you can choose an animal, choose a bird, as birds can be described as harmonic in many ways.
If you mean two that go together, here is a list (e.g. they go together like):
Bread and Butter
Two Peas In A Pod
Pen and Paper
Match and Candle
Fish And Chips
Sun And Moon (in harmony in the sky)
A Dog And Its Owner
I really hope that this helped you, in any way.
· 8 years ago