Mildew

The canvas tent had mildew growing on it after a camping trip.

The smell of mildew was strong in the musty basement.

The mildew on the leaves of the plant has a powdery texture.

The coffee had a mildew flavor that was smooth and earthy.

The beer had a mildew taste that was distinct but not overpowering.

The antique mirror had mildew spots on the glass.

The leather shoes had mildew on them after being left in a damp closet.

The shower curtain had mildew growing on it because it wasn't cleaned regularly.