champion
CHAM-pee-unverbMeaning to fight for or speak up for a cause or person
Memory hook a CHAMP who fights FOR a cause. Tia speaks up for the shelter dogs at every town meeting until the town builds them a new home. She champions their cause.
Ms. Ortiz championed the idea of a school garden for years.
In context Long before the trail was popular, a few hikers championed it, writing letters, clearing brush and leading free walks until the town agreed to protect it.
Similar defend, back, support, fight for
Opposite oppose, attack, criticize