You probably didn't mean simile but you meant synonym?
Agility or velocity
A simile for increase, or/and increasing could be like "A race car on a speed track." Or "A wolf hunting down prey."
I can finish my homework! (pretty slow)
A simile.
No
A metaphor
The word that uses like or as is a simile. a simile is used to compare things that are alike. This is why it uses like or as in its sentence. example: The girl ran faster than a speed of lightening. The comparison in the sentence is the girl and the speed of lightening. The sentence was trying to justify that the girl ran very fast.
It is a simile.
As quick as a wink is a simile. ----
simile its a simile when you use "like"
simile It is an example of a simile (uses like or as). A simile in itself though is a type of metaphor.
simile
This is not an idiom. When you see AS ___ AS ___ then you're looking at A Simile. Something is being compared to lightning speed.