As hungry as a wolf is an idiom used to represent someone's extreme hunger. There are several synonyms that can be used to represent the same meaning, such as starving, ravenous, famished, empty-stomached, peckish, and voracious. Starving is usually used to express extreme hunger, whereas ravenous is often used to signify someone who is consumed by hunger. Famished corresponds to a level of hunger that makes someone weak and miserable, whereas empty-stomached is often used to describe someone who has not eaten anything for hours. Peckish suggests a mild level of hunger, while voracious refers to someone who eats a lot of food quickly.