How to spell SNIFER correctly?

If you meant "sniffer", a correct suggestion would be to add an extra "f". Alternatively, if you meant "sniper", you should replace the "f" with a "p". In either case, checking the spelling before submitting is advised to avoid errors.

• Snider
• sniffer The sniffer dog was able to locate the drugs hidden in the luggage.
• snifter He sipped his brandy slowly from the snifter.
• sniper The sniper managed to hit the target with just one shot.

Attenttion

• attention
• attentions
• attenuation
• inattention