throw away vs cast out

throw away and cast out both are verbs.

Word	Noun	Adjective	Verb	Adverb
throw away	No	No	Yes	No
cast out	No	No	Yes	No

As verbs, throw away and cast out are synonyms defined as:

Other synonyms of throw away include cast aside, cast away, chuck out, discard, dispose, fling, put away, throw out, toss, toss away, toss out.

throw away (verb)	cast out (verb)
to remove	throw or cast away
throw or cast away	expel from a community or group