General Brazilian
desencadear medo; provocar medo
Most common and widely used throughout Brazil
São Paulo
desencadear medo; gerar medo
Urban usage, common in metropolitan areas
Rio de Janeiro
desencadear medo; botar medo
Colloquial variant 'botar medo' is more informal
Portugal
desencadear medo; provocar medo
Same as Brazilian Portuguese; standard European Portuguese usage