Hunger
Part of speech: noun
Definition: A need or compelling desire of food. Any strong desire.
Part of speech: verb
Definition: To be in need of food. To have a desire for.
Example sentence: We hunger to understand, so we invent myths about how we imagine the world is constructed - and they're, of course, based upon what we know, which is ourselves and other animals. So we make up stories about how the world was hatched from a cosmic egg or created after the mating of cosmic deities or by some fiat of a powerful being.
Thirst
Part of speech: verb
Definition: To desire.To be thirsty.
Part of speech: noun
Definition: A sensation of dryness in the throat associated with a craving for liquids, produced by deprivation of drink, or by some other cause (as fear, excitement, etc.) which arrests the secretion of the pharyngeal mucous membrane; hence, the condition producing this sensation.A want and eager desire after anything; a craving or longing; — usually with for, of, or after; as, the thirst for gold.
Example sentence: I thank God that I'm a product of my parents. That they infected me with their intelligence and energy for life, with their thirst for knowledge and their love. I'm grateful that I know where I come from.