Are you sure it's zoe? As it'd be written æïå and such a word doesn't exist. Maybe you mean æåõ? that can perfectly constitute the vocative of æåõò. There's also èïéùáù/èïéíç/èïéùá that is a feast or banquete but there word is apparently shown only in tragedies. Although there's a "zoee" æùç (æïí, æïá, æïéá) that is a form of æïïò, a poetic form of æùïò used by Theocritus.
Ôhis sounds more like a declension of that word. æùïò is something alive or living, capable of living or awake.. also related to something brutal or animal.. as full of live instead of barbarian. A living being or animal and it's very common in philosophy.