Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Portuguese começo
English beginning (link)
English commencement (link)
English beginning (link)
English start (link)
Portuguese começar (back-formation)
Portuguese comêço (alter)
Portuguese commeço (alter)
Portuguese (alter)
Portuguese obsolete (alter)
Portuguese commêço (alter)
Portuguese (alter)
Portuguese obsolete (alter)
Portuguese rare (alter)
Portuguese dar começo a (link)
Portuguese começar (mention)

Galician comezo (cognate)