Synonyms for Throw away:

n.

fritter away, misuse, chuck away, waste, wear out, overwork, abuse. do away with, remove, eliminate, replace, eradicate, dispose of. throw away (noun)
cast out, drop, cast away, cast, dispose, fling, put away, chuck out, toss away, throw out, shake off, toss, shed, discard, toss out, throw, cast aside.

v.

dispose of (verb)
drop, shed, discard, eliminate, shake off, cast, refuse, throw out, turn down.
reject (verb)
refuse, turn down.

Other synonyms:

fritter away, eradicate, chuck away, overwork. misuse, do away with, wear out, waste. replace, dispose of, remove. eliminate. abuse. discard
discard.
fritter
cast away.
get rid of
discard.
reject
cast out.
rid
toss out.
waste
fritter away, waste.
Other relevant words:
do away with, remove, turn down, chuck away, refuse, eliminate, dispose of, waste, fritter away, misuse.