Renounce - synonyms and antonyms

Synonyms
simpler words
decline, discard, give up,disclaim, disown,

adding to vocab
abdicate, abjure, abnegate, abstain from, apostacize, arrogate

defect, demit, deny, desert, disavow, divorce oneself from, drop out

eschew, forgo, forsake, forswear, leave flat

opt out, quit, rat, recant, relinquish, repudiate, resign, sell out, spurn,

take the pledge, tergiversate, tergiverse, , throw over, toss over, turn, waive, walk out on, wash hands of

using with words "off"
cast off, leave off, swear off, throw off

informal - dump

Antonyms
allow, approve, condone