Viga vs. Biga

Viga and Biga Definitions
Viga
A rafter or roofbeam, especially a trimmed and peeled tree trunk whose end projects from an outside adobe wall.
Biga
(historical) A Roman racing chariot drawn by two horses abreast.
Viga
A roughly-made rafter or roof timber, especially in a Latin American village
Biga
A two-horse chariot.