The Proto-Indo-European word *gʷōus
Word *gʷōus
Meaning cow, bull
See also Linear B: qo-u-ko-ro ‘cowherds, shepherds’
Cappadocian Greek: ποβιά ‘bull’
Greek: βοῦς ‘cow, bull’
Armenian: kov ‘cow’
Euphratic: *gud ‘ox, bull’
Tocharian B: keu ‘cow’
Ancient Macedonian: Βουκεφάλας ‘personal name’
Hittite: kuu̯āu- ‘cow’
C. Luwian: *wa-a-u-i ‘cow’
Proto-Anatolian: *gwóʔu- ‘cow’
Greek: βούτυρον ‘butter’
Proto-Indo-European: *gʷou-kʷolos ‘cowherd’
Lycian: wawa ‘cow, bovine’
Avestan: gauu- ‘cow, bull’
Sanskrit: gáuḥ ‘cow’
Synonyms *leh₃p-, *h₁eĝh-, *tauros, *wok̂éhₐ-, *lohapo-

Other words that might be of interest
*dhóhaus ‘to press, wolf’, *dhau-kos ‘wolf’, *ghaidos ‘goat’, *h₁eperos ‘boar’, *h₁er- ‘goat’, *h₁ék̂wos ‘horse’, *h₂ŕ̥tk̂os ‘bear’, *hₐegʷhnos ‘lamb’, *hₐeiĝs ‘goat’, *h₃owi- (nom. h₃owi-s, gen. h₃ewy-ós) ‘sheep’, *k̂won- (nom. k̂wōn, gen. k̂un-ós) ‘dog’, *kapro- ‘goat’, *márkos ‘horse’, *suh₁- ‘swine, pig’, *wlkʷ-o- ‘wolf’, *díks ‘goat’, *h₁eri- ‘sheep, goat’, *h₂ówis ‘sheep’, *koĝhéhₐ- ‘goat’, *twork̂ós ‘boar’, *uk(w)sēn- ‘ox’, *(y)ebʰ- ‘elephant’, *wr̥h₁ēn ‘lamb’, *k̂(u)wōn ‘dog’, *li(w)- ‘lion’, *mendyos ‘horse’, *moisós ‘sheep, ram, fleece, skin’, *perd- ‘lion, panther’, *(s)k̂egos ‘sheep, goat’, *ĝhéyos ‘horse’, *wailos ‘wolf’, *wl̥kʷos ‘wolf’