Heard in dispute: what calls for blessing?

• A blast this, room shelled in sound of mild explosion
• Sound of a sneeze
• Explosion, after which children all fall down?
• Sneeze noise
• Sign of cold - and what's required, we hear?
• Sneeze sound
• Sound of hooter, it has gone off with two rings
• 25 sound

Wiktionary Word definitions in Wiktionary
interj. (alternative form of achoo English) n. (alternative spelling of achoo English)