cast away vs remove

cast away is not a noun while remove is a noun.

Word	Noun	Adjective	Verb	Adverb
cast away	No	No	Yes	No
remove	Yes	No	Yes	No

As verbs, remove is a hypernym of cast away; that is, remove is a word with a broader meaning than cast away:

Other hypernyms of cast away include get rid of.

cast away (noun)	remove (noun)
	degree of figurative distance or separation

cast away (verb)	remove (verb)
throw or cast away	remove something concrete, as by lifting, pushing, or taking off, or remove something abstract
	stay away or leave
	get rid of something abstract
	shift the position or location of, as for business, legal, educational, or military purposes
	dispose of
	remove from a position or an office
	kill intentionally and with premeditation
	cause to leave