Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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German Theoretiker
German Theorie (suffix)
German iker (suffix)

German Verschwörungstheoretiker (affix)
German Konspirationstheoretiker (compound)
German Theoretikerin (suffix)
Norwegian Bokmål teoretiker (derived)
Norwegian Nynorsk teoretikar (derived)
Polish teoretyk (borrowed)