stocking cap vs ski cap

stocking cap and ski cap both are nouns.

Word	Noun	Adjective	Verb	Adverb
stocking cap	Yes	No	No	No
ski cap	Yes	No	No	No

As nouns, stocking cap and ski cap are synonyms defined as:

stocking cap and ski cap: a close-fitting woolen cap; often has a tapering tail with a tassel

Other synonyms of stocking cap include toboggan cap.

stocking cap (noun)	ski cap (noun)
a close-fitting woolen cap; often has a tapering tail with a tassel	a close-fitting woolen cap; often has a tapering tail with a tassel