Solemnization
Part of speech: noun
Definition: The performance of a ceremony (in an appropriate and solemn manner), such as performing a marriage.
Celebration
Part of speech: noun
Definition: The formal performance of a solemn rite, such as Christian sacramentThe observance of a holiday or feast day, as by solemnitiesThe act, process of showing appreciation, gratitude and/or remembrance, notably as a social event.A social gathering for entertainment and fun; a party.
Example sentence: Mature love is composed and sustaining; a celebration of commitment, companionship, and trust.