Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
esqueira
←
Spanish
escalera
(cognate)
←
Galician
escaleira
(doublet)
←
Latin
scala
(inherited)
←
Old Portuguese
escaeyra
(inherited)
→
Galician
escaleira
(mention)