The Old Norse word *ehwaz
Word *ehwaz
e h w a z
Meaning horse
See also Latin: equus ‘horse’
Proto-Indo-European: *h₁ék̂wos ‘horse’
Hittite: ekku ‘horse’
C. Luwian: az-zu-wa- ‘horse’
Mitanni: ašwa ‘horse’

Comments
See R. Palm, Vikingarnas språk, 2010, Nordstedts

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