fasten, 
secure, lock, lock up, attach, anchor
antonym: unlock
 
run 
off, scram, make a dash for it, take off (informal), run, make a run for 
it, disappear, escape, scarper (UK, slang) 
gulp, 
wolf, gobble, guzzle (informal), scarf down (US, slang), scoff (informal), 
devour, down
antonym: nibble