Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English conventional
English convention (suffix)
English al (suffix)

English average (link)
English unconventional (prefix)
English conventionally (suffix)
English conventionality (suffix)
English conventionalize (suffix)
English conventionalism (suffix)
English nonconventional (prefix)
English conventionalist (suffix)
English conventionalise (suffix)
English conventionalization (suffix)
English conventional PCI (mention)
English anticonventional (prefix)
English conventionalisation (suffix)
English preconventional (prefix)
English postconventional (prefix)
English counterconventional (prefix)
Dutch conventioneel (derived)