The Old Norse word boli
Word boli
b o l i
Meaning bull
See also Thracian: bolinthos ‘wild bull, bison’

Other words that might be of interest
bernu ‘bear’, *ehwaz ‘horse’, bjørn ‘bear’, fé ‘cattle’, kýr ‘cow’, gagarr ‘dog’, rakki ‘dog’, hundr ‘dog, a hound’, fær ‘sheep’, svín ‘swine, pig’, freki ‘wolf’, vargr ‘wolf’