Answer: cocoons

AnswerCrossword Clue
COCOONSSilkworm nests
COCOONSEncloses protectively
COCOONSSilk wrappings?
COCOONSSilk sources
cocoonsA similar structure made by other animals
cocoonsSomething that envelops or surrounds, esp. in a protective or comforting way
cocoonsCOCOON, to wrap tightly
cocoonsA covering that prevents the corrosion of metal equipment