Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Occitan
plueva
←
Catalan
ploya
(cognate)
←
Italian
pioggia
(cognate)
←
Latin
pluvia
(derived)
←
Latin
plovere
(mention)