cast off vs shake off

cast off and shake off both are verbs.

Word	Noun	Adjective	Verb	Adverb
cast off	No	No	Yes	No
shake off	No	No	Yes	No

As verbs, cast off and shake off are synonyms defined as:

Other synonyms of cast off include cast, drop, shed, throw, throw away, throw off.

cast off (verb)	shake off (verb)
to remove	to remove
make the last row of stitches when knitting	get rid of