To assert is defined as to make a statement with full confidence of its truth and factuality.
To defend or maintain (a cause, claim, etc.) against opposition
To adhere or conform to; keep:
To plead in favour of; to defend by argument, before a tribunal or the public; to support, vindicate, or recommend publicly.
(Tennis) To win a point by an ace.
Back is defined as to support or to move in a backward motion.
To bear the weight of, especially from below; keep from falling, sinking, or slipping:
To give advice or counsel:
To compete with; to strive against.
Find another word for championing. In this page you can discover 13 synonyms, antonyms, idiomatic expressions, and related words for championing, like: defending, asserting, vindicating, maintaining, challenging, advocating, ace, backing, upholding, supporting and recommending.