final stroke (?.)

• KO
• capstone
• climax
• clincher
• copestone
• crown
• crusher
• death stroke
• deathblow
• end-all
• ender
• final touch
• finisher
• finishing stroke
• kayo
• kayo punch
• knockout
• knockout blow
• last dab
• last stroke
• last touch
• lethal blow
• quietus
• settler
• sockdolager
• stopper