What is another word for could eat a horse?
Pronunciation: [kʊd ˈiːt ɐ hˈɔːs] (IPA) 
If you're looking for alternatives to "could eat a horse" to express extreme hunger, there are plenty of creative options to choose from. Some popular synonym phrases include "starving like a wolf," "hungry enough to eat a bear," or "ravenous as a lion." You could also say "as hungry as a hippopotamus" or "as famished as a zombie." If you want to get more specific, try "peckish as a buzzard" or "voracious as a hyena." There's no shortage of colorful ways to describe your hunger, so feel free to get creative and have fun with these synonyms.
