Craving

URGE

A sudden, intense impulse might describe this four-letter word for desire.

"Craving" is a strong desire or longing for something, and "urge" fits perfectly as a synonym—it means the same kind of intense impulse. The clue plays it straight with no wordplay or tricks, just a direct definition. If you think of phrases like "an urge to eat" or "resist the urge," the connection becomes even clearer. It’s a simple match where the answer mirrors the clue’s meaning exactly.