The Avestan word gauu-
Word gauu-
Meaning cow, bull
See also Proto-Indo-European: *gʷōus ‘cow, bull’
Armenian: kov ‘cow’
Tocharian B: keu ‘cow’
Hittite: kuu̯āu- ‘cow’
Sanskrit: gáuḥ ‘cow’

Other words that might be of interest
spa(n) ‘dog’, aspa ‘horse’, pasu ‘cattle, livestock’, vəhrka- ‘wolf’, sūn- ‘dog’, uštra- ‘camel’, būza ‘male goat, goat’