backstop Synonyms

catcher buttress up wall uphold sustain support steadying side serve serfage security second sea wall safeguard reinforce rampart propagandise handrail bamboo curtain shin guard pickets rearguard proselytise overarm guardrail mudguard lightning rod lightning conductor seat belt hold up safety glass seawall roadblock protection prophylactic comfort champion buttress bulkhead boost bolster benefit bear barrier bar back assist aid advise defense