A blast this, room shelled in sound of mild explosion

• Sign of cold - and what's required, we hear?
• 25 sound
• Sneezing sound
• A paper, it’s said, that may get someone’s blessing?
• Sneeze sound
• In dispute, heard report of expulsion
• Sneeze noise
• Explosion, after which children all fall down?
• I've got a cold and I'll tell you what I need

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