clincher Synonyms

determining factor determiner decisive factor mercy stroke conclusive proof availing argument convincing argument compelling argument argument of great weight persuasive argument trump card reductio ad absurdum rivetter eloquent argument forceful argument deciding factor final stroke final blow valid reason deciding moment crowning blow finishing stroke satisfactory argument reasonable evidence powerful argument potent argument good argument riveting machine kiss of death determinative determinant decider deathblow culmination concluder cogent cogency clench clasper clamp determinist end-all finisher coup de grace trump stinger sockdolager settler riveter redargution