Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Spanish
observar
←
Latin
observō
(borrowed)
→
Spanish
observatorio
(suffix)
→
Spanish
observación
(affix)
→
Spanish
observante
(suffix)