lurch

As verbs the difference between betray and lurch

is that betray is to deliver into the hands of an enemy by treachery or fraud, in violation of trust; to give up treacherously or faithlessly; as, an officer betrayed the city. e.g. Quresh betrayed Sunil to marry Nuzhat while lurch is to make such a sudden, unsteady movement.

As a noun lurch is

a sudden or unsteady movement.