break up
canker
corrupt
crumble
crumble into dust
decay
decompose
disintegrate
fall into decay
fall to pieces
fester
gangrene
gather
go bad
go to pieces
matter
maturate
mature
mildew
mold
molder
mortify
necrose
putrefy
putresce
rankle
ripen
rot
run
sphacelate
spoil
weep
discharge
draw
eject
exhaust
expel
release
suppurated
suppurates
suppurating