strengthen
index
aid, bear (support), compound, concentrate (consolidate), corroborate, develop, document, edify, empower, enable, endue, enforce, enhance, establish (entrench), heighten (augment), help, intensify, justify, magnify, nurture, reassure, recruit, reinforce, side, supplement, support (corroborate), sustain (prolong)
Burton's Legal Thesaurus.
William C. Burton.
2006