All the answers I have seen have been the name of bands/artists so I don't think Romance works as it is not a band name (Yes there is My Chemical Romance and someone has found a facebook site for a band called My Natural Romance, but the answer can't be two band names can it?)
I wondered about The Cure but that's too weak. There are no bands called Elements/Symbols/Fertilizers to my knowledge!
Could it be to do with being opposites? No names spring to mind.
This is an odd one