different between commemoration vs solemnisation

English

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.

solemn +? -isation

solemnisation (countable and uncountable, plural solemnisations)

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