Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
съньмъ
←
Proto-Slavic
*sъ(n)ьmъ
(derived)
→
Old Church Slavonic
съньмище
(suffix)
→
Russian
сонм
(borrowed)