Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle High German
zacke
→
German
Zacke
(inherited)
→
German
zacken
(inherited)
→
Luxembourgish
Zack
(inherited)
→
Pennsylvania German
Zacke
(inherited)