different between revelry vs commemoration

English

revel +? -ry

revelry (countable and uncountable, plural revelries)

Joyful or riotous merry-making.
- 2014, Paul Salopek, Blessed. Cursed. Claimed., National Geographic (December 2014)[1]
  The women pale and staring under the sun. In plain skirts, drab shoes. In hair scarves. Their drunken revelry jars.

From commemorate +? -ion, from Old French commemoration (French commémoration), from Latin commemor?ti?nem, verb commemor?re.

commemoration (countable and uncountable, plural commemorations)

The act of commemorating; an observance or celebration to honor the memory of some person or event.
That which serves the purpose of commemorating; a memorial.
(religion) The specification of individual saints in the prayers for the dead.
(Britain) The great festival of the Oxford academic year, usually taking place on the third Wednesday after Trinity Sunday.

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