There are several things that compound with time.
Money compounds. A rupee or a Euro can be invested to bring in more. Relationships compound. One friend in a new city could lead to two, four and several more. Knowledge and skill compound. The drops we add everyday collect and combine to make us experts and professionals in the long-run.
However, time itself does not compound. One minute does not yield another minute. Instead, everything else that compounds feeds of it.