markThe backs of the chairs have left marks on the wall.
stainShe had grass stains on her white jeans.
smudgeNo matter how often I wash my hands, I leave smudges all over my phone's screen.
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.