As nouns the difference between placemat and doily
is that placemat is a place mat while doily is a small ornamental piece of lace or linen or paper used to protect a surface from scratches by hard objects such as vases or bowls; or to decorate a plate of food.
A small ornamental piece of lace or linen or paper used to protect a surface from scratches by hard objects such as vases or bowls; or to decorate a plate of food.