滅亡 （メツボウ） downfall, ruin, collapse, destruction

滅罪 （メツザイ） expiation

隠滅 （インメツ） destruction (esp. of evidence), spoliation, suppression, hiding, concealment

衰滅 （スイメツ） decline, downfall, ruin(ation)

滅びる （ほろびる） to go to ruin, to go under, to fall, to be destroyed, to die out, to become extinct, to perish

滅ぶ （ほろぶ） to be ruined, to go under, to perish, to be destroyed

滅ぼす （ほろぼす） to destroy, to overthrow, to wreck, to ruin