lust

Lust is a strong desire for something or someone. (noun)

An example of lust is the feeling a guy feels when he looks at an extremely attractive supermodel.
An example of lust is a strong desire for a sleek new car.

Lust is feeling a strong desire for someone or something, especially of a sexual nature. (verb)

An example of lust is what you might feel when you see a really attractive person of the opposite sex.
An example of lust is when you feel a very strong desire to buy a sleek new car.

See lust in Webster's New World College Dictionary