defect

[1]	desert , change sides/loyalties , turn traitor , go over , escape
[2]	desert

[1]	shortcoming , deficiency , lack , want , inadequacy , insufficiency , shortfall , failure , weakness , frailty , weak point , imperfection , irregularity , liability
[2]	blemish , shortcoming , imperfection , failing , weakness , flaw , fault , mark , stain , irregularity , mistake , error
[3]	fault , flaw
[4]	blemish , mar