Preheat the oven to 350°F (175°C) and grease a loaf pan.

In a large bowl, mix together the flours, sugar, baking soda, baking powder, salt, and spices.

In a separate small bowl, combine the pumpkin purée, oil (or applesauce), maple syrup, and water.

Add the wet mixture to the dry ingredients, stirring just until combined into a thick batter.

Fold in the chopped nuts.

Pour the batter into the prepared loaf pan and place it on the center rack of the oven.

Bake for 45-50 minutes, or until a toothpick inserted in the center comes out clean.

Let the loaf cool in the pan for 10-15 minutes on a wire rack.

Gently loosen the bread from the sides of the pan using a butter knife or spatula, then transfer it to the wire rack to cool completely.