Answer:
They should end up like this. 北+南 終+始 冷+暖 臭+香 覇+劣
北 HOKU, kita - north
南 NAN, minami - south
終 SHUU, o(waru), o(eru) - end, finish
始 SHI, haji(meru), haji(maru) - start, begin
冷 REI, tsume(tai), hi(yasu), sa(masu) - cold, chill, poke fun at
暖 DAN, atata(kai), atata(meru) - warm
臭 SHUU, kusa(i) - foul smelling, smelling of ..
香 KOU, KYOU, kao(ri), kao(ru), ka - fragrance, aroma, smell sweet
覇 HA - supremacy, domination, hegemony
劣 RETSU, oto(ru) - be inferior