speed
noun.
distance travelled per unit time
Synonym: velocity
noun.
a rate (usually rapid) at which something happens
the project advanced with gratifying speed
noun.
changing location rapidly
Synonym: hurrying, speeding
noun.
the ratio of the focal length to the diameter of a (camera) lens system
noun.
a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
verb.
move hurridly
He rushed down the hall to receive his guests|The cars raced down the street
verb.
move faster
The car accelerated
verb.
move very fast
The runner zipped past us at breakneck speed
verb.
travel at an excessive or illegal velocity
I got a ticket for speeding
verb.
cause to move faster
He accelerated the car