Karman: work or action; originally a sacred action or sacrifice, later, a moral act; the result of all acts and works, the crystalized act, according to the law of karman which governs actions and their results in the universe.
Samsara: the world of phenomena, the cosmic cycle of temporal existence, state of identification with the existence of such.
Moksa: from the root muc or moks (to free, loosen): salvation, absolute liberty, freedom from samsara, the birth-death cycle.