Here's what rhymes with volunteerism.

Consider these alternatives

voluntarism / given patriotism / given activism / given philanthropic / logic altruism / given interfaith / face inclusiveness / exclusiveness piety / variety inculcate / great promiscuity / continuity grassroots / groups initiatives / derivatives mentoring / entering internationalism / given environmentalism / given multilateralism / bilateralism homeownership / which nonprofits / profits humanitarianism / given evangelism / given motivate / state