Related Clues:

• Solemn observance, e.g.
• Market opening?
• Word with critical or Catholic
• Physics concept
• Suitable, in product names
• ''The ___ of Spring''
• Rain dance, e.g.
• Weekly service
• Exorcism, e.g.
• Customary act
• Liturgical act
• Initiation practice
• Part of 'E=mc2'
• Bar mitzvah or baptism
• Bit of liturgy