Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
cousa
←
Spanish
cosa
(cognate)
←
Galician
causa
(doublet)
←
Latin
causa
(inherited)
←
Portuguese
coisa
(cognate)
←
Old Portuguese
cousa
(inherited)
→
Galician
couso
(mention)
→
Portuguese
coisa
(cognate)