Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Danish regn
Proto-Germanic *regną (inherited)
Old Norse regn (inherited)

Danish regne (cognate)
Danish regnbue (compound)
Danish regnvand (compound)
Danish syreregn (compound)
Danish regnmåler (compound)
German Regen (cognate)