Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
montón
←
Spanish
montón
(cognate)
←
Galician
monte
(suffix)
←
Galician
ón
(suffix)
←
Portuguese
montão
(cognate)