apostacize
betray
bolt
break away
change sides
defect
degenerate
desert
fall away
fall off
go over
let down
pull out
rat
renegade
renege
renounce
repudiate
run out on
secede
sell out
switch
switch over
tergiversate
turn
turn against
turn cloak
turn traitor
disown
apostatized
apostatizes
apostatizing
apostasy
apostate