Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
ama
←
Catalan
amma
(mention)
←
Spanish
-
(cognate)
←
Portuguese
ama
(cognate)
→
Catalan
amo
(back-formation)