affirm Synonyms

aver confirm protest assert asseverate assure substantiate support sustain avouch swan avow swear declare corroborate verify validate pronounce ratify swearing promise testify underline profess pronouncing underwrite uphold professing proclaim sworn say propone reconfirm reassert reaffirm stating subscribe radicate prove state protesting spitball propound undersign verified authorise decriminalise notarize soapbox invigilate