Difference between a Graveyard and a Cemetery

I was not aware that there was a difference, but there is.

A Cemetery is a burial ground that may or may not be within Church grounds

A Graveyard is a burial ground that is within Church Grounds (technically within concecrated grounds).

The following website gives a great definition of both:

https://www.differencebetween.com/difference-between-cemetery-and-graveyard/

The word cemetery originates from Greek koimētērion means ‘sleeping place’. This is a place where we bury the remains of dead people. Cemeteries are a relatively new concept. They came into being when traditional graveyards became full with the increase in population. Unlike a graveyard, a cemetery is not adjacent to a church.

A graveyard is a burial ground that is adjacent to a church. In other words, a graveyard is a part of the churchyard. In the past, people, especially nobles and rich people, were buried close to the church. Some were buried in crypts underneath the church.  The church had the power over the burial of the dead. For example, those who committed suicide were not allowed to be buried within the consecrated grounds of the graveyard. They were instead buried just outside the cemeteries.

Cemetery is a burial ground whereas graveyard is a burial ground in a churchyard. Thus, the main difference between cemetery and graveyard is their location. Moreover, graveyards are older than cemeteries since cemeteries are a relatively new concept.