Answer: avower

AnswerCrossword Clue
AVOWERDeclarer
AVOWERConfessor
AVOWEROath taker
AVOWEROath-taker
AVOWERAssertive one
AVOWERSolemn promiser
AVOWEROne who frankly admits
AVOWERDeponent
AVOWEROne saying "I do"
avowerto declare
avowerone who avows (to declare (to make known clearly))