markThe backs of the chairs have left marks on the wall.
stainShe had grass stains on her white jeans.
smearHe had smears of tomato ketchup on his shirt.
blotchHe had blotches all over his face.
speckShe looked through the old camera lens and saw specks of dust.
fleckThere were a few flecks of paint on the window.
spotHe had some grease spots on his tie.
streakThere was a streak of dirt on her arm.
bloodstainBloodstains are difficult to get out of fabric.