Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Occitan
ploja
←
Catalan
pluja
(cognate)
←
Latin
(mention)
←
Latin
pluvia
(inherited)
←
Old Occitan
(inherited)