Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old High German
rouhhen
→
German
rauchen
(inherited)
→
Central Franconian
rooche
(inherited)
→
Alemannic German
rauche
(inherited)
→
Luxembourgish
raachen
(inherited)