Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
burbullar
←
Catalan
borbollar
(cognate)
←
Italian
borbogliare
(cognate)
←
Latin
bulla
(derived)
←
Portuguese
borbulhar
(cognate)
→
Galician
burbulla
(back-formation)