There are two usual similes, one animal, one object:
As swift as an eagle
As swift as an arrow
*The corresponding simile, even more extreme, is as fast as lightning.
Rabbit
Personification.
What simile can you use to complete "Deaf as a post"?
mule
fiddle
As dear as salt
Niagra Falls morning.
...mule."
as blue as sea
my teacher was as surprised as a dog
To listen like a hawk.
I can finish my homework! (pretty slow)