plumón
down
pluma
feather
+
-ón
augmentative suffix
Plumón means down and can be thought of as pluma0 (feather0) + -ón1 (augmentative suffix1), implying a large or thick collection of feathers.
noun
- downA soft, fluffy feather or downLa almohada está rellena de plumón de ganso. // The pillow is filled with goose down.
- markerA felt-tip pen or markerUsa el plumón negro para escribir el título. // Use the black marker to write the title.