(n.) Nap or down; flue; soft, downy feathers.

Irish bull aerate air anacoluthon bad job ball up bevue bloomer blooper blow blubber blunder bobble boggle bollix bonehead play boner boo-boo boot botch breeze bubble bull bungle butter catachresis chaff chip clay clumsy performance cobweb cock up cork cushion daintiness delicacy dough down downiness drop a brick drop the ball duff dust ease eiderdown error ether etourderie fairy feather feather bed feathers filminess fine-grainedness fineness fleece floss flub flue fluffiness foam folk etymology foozle foul up froth fuck up fumble fur fuzz fuzziness gaucherie gentle girl friend goof goof up gossamer gossameriness grammatical error hash howler hypercorrection hyperform kapok knead lapse laxate limber limber up lint loosen louse up malaprop malapropism marrowsky mash massage mellow mess mess up milden miscue mispronunciation missaying mistake mistress misusage mollify mote muck up muddle muff off day peach fuzz pile pillow plump plush pubescence pudding puff puff up pull a boner pulp putty refinement relax rubber ruin sad work satin satininess screw up shake up silk silkiness slip smash smoothness snafu soften soften up softness solecism spoil sponge spoonerism spume squash straw stumble subdue supple swansdown tenderize thistledown tone down trip tune down velvet velvetiness wax wool zephyr