Appearance/Form:
* Grow: A pumpkin grows large and round.
* Bulge: The pumpkin's sides bulged with ripeness.
* Swell: The pumpkin swelled to an impressive size.
* Curve: The pumpkin's surface curved smoothly.
* Shine: The pumpkin's orange skin shone in the sunlight.
* Glisten: The pumpkin glistened with a layer of dew.
Texture:
* Feel: The pumpkin feels smooth and cool.
* Touch: You can touch the pumpkin's velvety skin.
* Weigh: The pumpkin weighs heavy in your hands.
* Heft: The pumpkin hefts solidly when you lift it.
Actions:
* Carve: A jack-o-lantern is carved from a pumpkin.
* Decorate: The pumpkins were decorated with colorful paint.
* Scoop: They scooped out the pumpkin's innards.
* Bake: Pumpkin pie is baked with pumpkin puree.
* Roast: Roasted pumpkin seeds make a tasty snack.
Metaphorical:
* Smile: The pumpkin smiled a wide, toothy grin. (for a jack-o-lantern)
* Glower: The pumpkin glowered menacingly in the dark. (for a jack-o-lantern)
* Beam: The pumpkin beamed with a warm, cheerful glow. (for a lit jack-o-lantern)
You can also use verbs to describe the pumpkin's state:
* Rest: The pumpkin rested peacefully on the porch.
* Sit: The pumpkin sat among a pile of leaves.
* Stand: The pumpkin stood tall and proud.
The best verbs to use will depend on the context and what you want to emphasize.