Short & Sweet:
* Dusk ducks duck dark ducks.
* Dusk dusts dusty desks.
More Complex:
* The dusky dusk dove dives down to drink, drinking deeply despite the darkening dusk.
* The dusk-loving dragon, dusted with dew, devoured a dozen donuts during the dusty dusk.
Let me know if you'd like more options or want to explore other themes!